Bài tập trắc nghiệm Lũy thừa 20162017

Dd tiri hlrn so c6 rn6t tAm doi xfrng s... Tim monh dd dring trong c6c menh dd sau: A.. Tim mOnh d0 dfing trong c6c m0nh cld sarr: x losx A.

Cflu1: Tinh: K =

A L2

Cflu2: Tinh: K =

A 10

C*u3: Tinh: K =

(A)

-\_/ 13

LU? T}IUA L

[ 1)-o'" It\-:

l- | +l- I

\16' \,8/

B 16

2'.2-t +5-3.5*

, ta duoc:

c 18

, ta duo c 1o-3 : 1o-2 -(o,zs)o

,/ 1\'

2:4-2 +(3-' )' I 1 I

\ /lol \),/ t-' ,.taduoc

(r)-'

.l-l

\2)

5-'.25'+ (0, z)o

I

B.- -J

5 c.-a

3

2

CAu4: Tfnh: K = (0,04)-''' - (0,125)-l \/ , ta duo c

A.90 ( 8J121 C 120

,Y 6 4

CAuS: Tinh: K = 87 : 3i - 31.3i ra duoc

7_52-5"

Cflu9: Cho f(x) = V;.V; Khi d6 f(g.S?) bang: \'

A o,1 '!:P G/,3 D o,4

cflulo: Cho fix) = J*.}',

Khid6 fr!'l bdne:

il

10 rb) \-/ 1013 Cflult: Ch_o f(x) = fifi'dt' Khid6 f(Z,1)bang:

@ 2,7 8.3,J C 4,7 D 5,1 .

Cflul2: Tinh: K - 4s+J1.2r-dz .2+*Ji, ta duo c: ' .

CAul3: Trong ci{c phuong trinlr sau dAy, phuong trii6 n}o c6 nghiOm?

:

1 -1l:.xl

A x6 + 1=0 B Jx-4+5:0 C xi +(x-r); =g @ ^- -t=0 Ciul4: M€nh dd nio sau dAy li dring?

i-o (f -Jr)- (S -Jr)' B (*1 -J7)' , (J" -.,D I

t / r-\3 i r-tl

-r3

(r-J7)' lr-Jl) (d(^ -.,0)' (+-Ji)^ i

CAu15: Chon m0nh dO dring trong c6c m0nh dri sau: i

@ro

D 15

D 125

D.4

D.4

2

C6u5: Cho a li mdt sd duong, bidu thrlc ul Ji vidt dudi dang lu! thila vdi sd mfr hftu t!, lil:

(a) \-/ uu o B a6 C ai D a7

^-=

cAuT: Eidu thrlc u',11u] vidt dr-r-oi dang lu! ttrrra vryi sd mfl hfru $ ln: j'

i^2si

.

cauS: Bidu thfc Ji.fi.{/t' (x > 0) vidt du6i dang ru! thira v6i sd mfi hffu rf t}:

A 4-J5 > 4-'5 B 3r'r < 3l'?

t r- ti

CAu20: Rdi gorr bieu thLic: yrr/xlx1r : x ''

Carr16: Cho;" >;'t l{ t lilin ii}i;.liu iial,iii drirrg?

A.cr<$ @r;or$ C.u+$=g D.a.B=l

(t ''rt( ,[ \]

cau17: L-hoK= i *' -y' I i r-r.,i)' +)' I r",iiu thric nitgoncua K l):

\ i[ \^ x)

!$* B.2x C.x+l D.x-l

CAu18: RLit gon hidu thfc: JSLJbt , ta cludc:

A" 9a2b B -9a2b @ Oo'1t,|

Cfiulg: Rrit gon bidtr tlrLic: \[L- - U' lit duoc:

, ta dtloc:

D J;

@ *'lx+ rl

.[;) [i)"

@(3)'.(i)"

D Kdt quilkhdc

o lx(x + t)l

Cin22: Riit gon bidu thfrc o =_( rE - "'? * r

) (rt; * {& *,

) (^ - ,E - r )

A"xr+1 @)x2+'x+1 C.x2-x+1

5

/r\ra

A l:l

\,3 /

1

" [3)',

C.cr<3

I

1r \o

D.i:i

[:,r

ta duoc:

D.x2-1

@-:<o<3 B.ct>3

I

B (?\"

t3l

c 1

D.creR

:,fii nVG*i,/+ p tB+{/a

c6 gi6 tri bang:

CAu23: lieu :

2

j

;(r^ * u o )= t rhi gii tri curr o- la:

a -1.

A.3 8.2 C.r (U.O

\-f Ax1A r-h^ ? '''' - }-t \IA-t- .{A -;^ c-,r ,t^.; I; t,',-^,)

\-4U!4 UrlV v \ E, itrlrrrr uL rldu Jutr urrJ ld vlltrb,

CAu25: Truc cdn thttc & mAu bi<ju rhf J-; ta duoc:

.1/< -r/-r

vJ -1,/^1

il25 +i/lu + il4

s i/i * V, c.

7 1'/I-r

Ciu26: Rrit gon bidu thfic uut I I I to > 0), ta duoc:

/ A, a B.2a C 3a D.4a

\_-/

Ciru27: Rtit gon hieu thuc 6{r: ti

: b j:': (b > 0) ra duoc:

-+

CAu28: RLlt gon bidu thr?c x.{"x' :x'n (x > 0), ta duoc:

A V; B ii (9'r'* o *l

Cfiu29: Cho 9' + 9-* :23 Khi do bidu th(rc K = 1t1' I :-l

r a( 1'1

I_J -J

5

rA\ -:

\/ )

1l

D.2

, a -t-l

.Neua= {2+J3 I

\/

o rt l-l

(U

o u\jnl,

1\1

n.-thi gi6 tri cria A lh:

o-.Y 1

}t

vdu= (r-€) ' C*u30: Cho bidu th(rc A = (a + t)-' + (U * l)-'

@r I).2 u.3 f] ;i

HANI SO T,TiV'TTILTA

,r -;

Vl - x' cd tAp xiic dinh lir:

B.(-*; -11 u [i; +co) C l1\,{-1; I }

@n

(o*' -t)-' c6 tap xdc dinh li:

B(o; +m)) 0*{j,;i " [j, ;)

l

(o *^'

); c6 tap x6c dinh liL:

CAul: Hlim sd y =

A [-1; 1]

CA.uZ: Hhm sd y =

A.R

CAu3: Hlim sd y =

A [-2;2]

C*u4: Hhrn sd y =

A.R

CAu5: Hlm sd y =

*^,1(^' - I

)" co tap x6c dinh ld:

(U (1: +*) C (-l; 1)

D:R\{-l; 1} i r.r)L'

C y' = 2xV^'+ r :D y' =

,r -C y' = 3bx'{/a + bx j

D y' =

I

D.4

lAJv'=:

\-/' ?i/-2 - r

Uriu6: Hdrir sd y ,= i'Li-ii | .O clao h;inr f'(0) lh:

I

\At -;

.vJ

Cfiu7: Cho hlm ,d y =^tlT* - r Dao hlm f'(x) c6 r6p xdc dinh 1I: ,

A R _&Or ,, C (-co;0) u (2; +m) D R\{0; 2i

C;:iu9: Cha f(x) ,= x:il;2- Dao hi\m f'(1; bangi

@:

cflu1O: cho f(x) =

m Dao hhm f'(0) b[ng:

@#

Cau1tr: Trong cdc him so sau dA1,, him so nio dring biai trdn cic khoang no xii.c dinhi

cau12: cho hlm s6 y = (x + 2)-t I{0 thLlc giiia y vh y" khong phq thut\c v)o r lh:

Q).V"+2y=[) B.y" -6y'=0 {-.Zy', -3y=0 ,D.(y,,)r-4y=0

(;aul3lCho him so y = x' f}n rnflnh ctd sai trong c{c ur6nh dd sau: ;

E Dd rhi hirm so di ilrra .licrn 1 I : t;

C Dd rhi harn sO cri hai clu&rg ti6rn ctiii :

D Dd tiri hlrn so c6 rn6t tAm doi xfrng

s 1

J

A."

8

A I

c.2

'teula:

Tren cld thi (C) ciia hirm sci 1'= la;r clidrn Mo c6 hoinh d0 x^ = i Tidp tuydn cita (C') tai didrn N'{ , c6 phucfilg trinh il:

;1.

A.v=:x+[ '2

Ciuls: Tren cl6 thi cira hlm so y = xl-'la1 didm Mo c6 holnh c16 xn = 2* .Tidp tuyen cta (C) tai didrn Mn c6 h0 so s6c bins:

1

x2

lOcanir

Caul: Cho a > 0 vI a+ l Tim monh dd dring trong c6c menh dd sau:

A 1og" x c6 nghia voi Vx

C log"xy = log.x.log.y

C.2n-1 D.3

c.2

B iog.l = a vh log"a = C

O ro*" xn = nlog x (x > 0,n * 0)

B loe l= 1

"" x lof" x

CAu2: Cho a > 0 vir a+ 1,x i')r y li hai sd dtrong Tim mOnh d0 dfing trong c6c m0nh cld sarr:

x losx

A Ioc aa

-:r-y log, y

C 1og" (* t y) = logn x + 1og Y

CAu4: 1og, ii a' (a > 0 a+ 1) trirng:

;

CAuS:

B

bang:

C&u3: 1og tT bang:

l.

2

CAu6: 1ogr,0,125 b[ng:

/ :r,t::fJ\

C5ru7: los i l1i 11- | brng'

\' '\a )

5

CAuS: 49to'tt2 bang:

L ios, to CAu9: 64: -' bzing:

A 200 ts.400

Cau10: _10'o218' bang:

\/,

caull: oiros:3+3luers bing:

5

c.-4

5

c.'

J

3

8

1 J

[D, log x = logn a.log x

\_/

D.2

D.4

D.3

D.5

D.2

D.5

D 1200

D.3800

4

B.-5

.1

(n. \J3

log, {52

I

s

A -'

q

c.-5

@+

CAu12: u3-21os"b (a > 0, a+ 1, h > 0) bang:

a-(ry utu' B a'b c a'b'

Caul3: Ndri iog- 243 = 5 thi x bang:

(c 1000

c.4000

D ab2

D.5

' -\

c&u14: Ndu iog, ztr{i =-4 rhi x bang:

Ciul5: 3logr(logo 16)+1og, 2 bang:

>\?

IAI2 B"3 C.4

CAu16: Ndu log, x = llogu9 -log" 5 +1og" 2

CAu18: Neu 1og, x =51ogz a+4logrb (a, b >0) thi x bing:

@ u'a' B aab' c 5a + 4b D" 4a + 5b

Caul9*d{€u log, x = 8*g, ab) -ZIog, a3b (a, b > 0) thi x bang:

A aob6 (BJ a'b'o C a6b', D arb,o

Cau24: Cho log,6 = a " Khi do iog.i8 tinh tl-reo a ii:

1tr 2a-1

Cau25: Lfho log.5 = *; Iog, 5 -= b Khi ct,i logu 5

A -]- a+b OjL -a+b c a + b - ;'*'* ,D az +bz

CAu26: Gii sri ta c5 h0 thric a2 + b2 = 7ab (a,b > 0) H0 thrlc nlo sau day Ii dring?(a+bl = ,i?.

CAu28: Vdi gi;1 tri nlo c,ia x rhi bidu tirL?c logu (2x

as

-5

Cflul7: Ndu 1og" * = l(1og- 9 -31og 4) (a > 0, a*

2' ua ua

CAu20: C}o$2 = a Tinh 1925 theo a?

C&u21: Cho lg5 = a Tinh tgf "64 tneo at

A.? 55 r.1

4.2+5a

D.5

D.5

(a > 0, a* 1) thi x b[ng:

D.3

1) th) x blng:

D 16

@r,,-,

C.4-3a

D 3(5 - 2a)

B 1-6a

@o1u- ry

fl.6+7a

n

a_-u.vd-:

Cilr.Zh: Cho lg2 = a Tinh WEitheo "4 a?

Ceu23ICho logr 5 = a Khi d6 logo 500 rfnh theo a li: :

tinh theo a v) b th:

o rL

C log,

T = Z{togra + Iog, b)

Cim27: log* 8.1ogo 81 bang:

@ o <x<Z B.x>2

CAruZ9: TQp ho-p cdc gi6 rri cira x dd Uidu thrlc log,

A (0; 1) B (1; +m)

CAu30: log o 3.1og,36 al bang:

D 4log, ulo

=togrir+ logr b

vl

6 ', aL

.-*') c6 nghia?

i

C.-l<x<l lD.x<3

(*' - r' -2^) cd nghia: lh:

lpCr,0) u (2; +oo) r'[ (0; 2) u (4; +m)

@)+ B.-? c.z D I

F{A}l So n'rlr - H"cM sd l0c.,rRir

Caul: Tirn m0nl', CB dring trcng c6c rnenh <id sau:

A I-{}rn sdy - a' vdi 0 < a < i ih ;nOt lihrn sdddng bidn tr€n (-oc,; i-co)

B Hlrn so y - a' vdi a > I th m*t hlm sd nghich bidn tr0n (-m: +cc)

C Dd thi li)"m sd y = a* (0 < a * 1) 1*on cli qua didrn (a ; 1)

/n.bO thi c6c hirm sdy = a' vI y = i -: ; (0 < a * l) thi doi xrrng vdinhau qua truc tung

CAu2: Cho a > l Tim m0nh d6 ssi trqrns cdc m6nh di sau:

A.a'>1khix>0

8.0<a"<1khix<i)

QNeux <x.th) a' <rt'

(n)fruc tung li ti€m cAn dring cira dt) thi hhm so y = a"

Cdru3: Cno 0 < a < i Tim menh dd sai trcrng c:6c m6nh dii sau:

A.a'>lkhix<0

8.0<a'<1khix>0

/\

($ n-eu Xr ( Xz thi a'' < a"

D Truc holnh li tiOm cAn ngang c&a Cd thi hhm sd v = a'

CAu4: fim mOnh dd dfng trong c6c menh dd sa.u:

A Hdm sdy = 1og, x vcri 0 < a < I 1)rmOt hlrn so ddng bidn trOn kho6'ng (0 ; +cc)

B H).m s6 y = iog" x v<ri a > 1 lirm6t h)m so nghich bien tr6n khoang (0 ; +co)

C Hhm s6 y = 1og" x (0 < a * 1) co tip x6c dinh lh R

/

1p.D0thicdchhmsdy= log"x v)y- lsg x (0< a+I) thiddixfrngv6inhauquatrucholnh

CAuS: Cho a > 1 Tim m€nh r1d sai trong c6c inOnh'd.i sau,

A log"x >Okhix>1

B 1og^x<0khi0<x<1

C Neu xr ( X thi 1og, x, < 1og,

x-(ry Dd thi hhm sd y = 1og x c6 tiom cAn ngang l) truc hoinh

.CAu6: Cho 0 < a < lTirn mgnh dti sai trong cdc rn0nh dd sau:

A.iog,x>0khi0<x<l

B log"x<0khrx>1

/ \

Q,)Neu xr ( X, thi log x, < Log, x,

D Dd thi hhm sd y = 1og, x c6 tiOm cAn drlrng li truc tung

CAuT: Cho a > 0, a + 1 Tim rndnh dO dfing trong cdc m0nh dd sau:

A Tap girl tri cia hdrn sd y = a- 1)r tap R

/B)'Iap gi;i tri cria hhm sd y = logo x l) tap R

\-/ .L U

C T'?p xdc dinh cila him so y = a- li kho6,ng (0; +,:o)

D.T+p xdc dinh cria hlm sd y = 1og, x le mp R

CAuS: Hhrn sd Y = ltr (-^' - Sx - O) c6 tAp xdc dinhlh:

/^\

A (0; +co) B (-"o; 0) (C {2; 3) D (-*; 2) u (3; +co)

Cflu9: Hlm s6 y = ln (rtr; , -

^) .O tdp xic dinh li:

\/

Ciu10: Hhm -so y = ln !t - sl,, xl c6 tap xdc dinh th:

-$ xt{; kzn,kez\ B R\ {x+kln,ke Z}

Ciull: Hhm sd, = al; c6 tap rdc dinh li:

C*u12: Hlm sd y = 1og, (O^:,*') c6 tap x6c dinh li:

CAu13: Hhm sd y = log,G

fr O tap x6c dinh 1):

A (6; +o) B (0; +co) @(-*; ei

CAul4: Him s0 nlo du6i dAy ddng bidn tr6n tdp xdc dinh ctra n6?

A.y = (o,s)^

@r= (Jt)'

r:^ ('t\&

t9 t;l u (Ju )'

Cflul7: Sd nlo durii dAy ttri nho ho'n 1?

@ rog, (o,z) B log, 5

c R\tt*u", k€zl D.R

D (0; e)

D.R

/,r \x

s.v=l1l ' lal

\-,/

c."

C n"

C logn e

3

D Ket qui khfc

D.4

D.4

D.R

D-y=

D en

D 1og.9

D Ket qui kh6c

/ \x IC\

t_l

[ ".]

CAu15:H}rms6n}odu6idaythinghichbidntr6ntAp-x5cdinhciian6?

A.y=logrx B.y=logrrx

OV=log"x ,D.y=lognx

Ciu18: Him sd y = (*' -2x+2)e' cd dao him ti:

@ V' = x2e' B y' - -2xe" C y' = (Zx -'2)e*

Cfin19: Cho f(x1 = !r- :." D+o lilm f'(1) bang :

X<r

Ciu20: Cho f(x) = 9 { Dao 1},r f'(0) beng:

2

Cdu21: Cho f(x) = in?x Dao hlm f'(e) bang:

r:?

(riJ:

-e

{JAu22: H}n so f(x) = 1u ]l1 c6 dao h}m th:

^1

A.-C*u24: Cho f(x) =

A I

C*u25: Cho f1x; =

A 1

xx

41 _l+ B tn*

A

D

e

c1+

x*

CAu23: Cho f(x) = ln (*' + 1) , Dao hirrrr f'(l) bzing:

ln lsin lxl Dao he* r J +l

(92 c l Inltanxl Daohlur,

[;)

(ry: c 3

biing:

biing:

il4u26: Cho y = ln L Fle thri'c ci'iir v vh v' kh6ns ohu thudc vlo ,*: l:):

A.Y'-2Y (!V +e)=0 CYY'-2=(]

Cilttl7: Cho f(x) = e'''l- Dao-hhrn f'(0) bane:

A1 (s)z c"i D4

D.1n5

-n(q +,hr)

C nlnn D xzlnn

D.y'-4eY=0

D sin2x

D.4Ln2

D.x=2

Ciu28: pho ftx; = scosrr Dao hlm f'(0) bing:

@o ,1"t c.2 D 3

C*u29: Cho f(x) = 2;r Dao hlm f'(0) bang:

A.2 @ rnZ C.2ln2 D- Ket qui khdc

r'( o) cau30: cho f(x) = ranx vd rp(x) = ln(x - i ) Tinh :l; Drip so cfra bhi to6n llt:

a'(0)

Ciru3l: H)nr so ltx) =-ln(^ *'uir 1j c,rr.]ao hlm f't0) l):

Cfiu32:pho f(x) = 2'.3" Dao him f'(0) bang:

(!,1n6 B 1n2 C ln3

CAu33: Cho f(x) = x'.n* Dao hhm f'(1) bang:

A n(1 + 1n2) B r(l + lnn)

C" cos2x

c.2

D 2 + 1nl0

_i

C.x=-U

cau34: Hhm st5 y = ln lcos r + sin x

| o ouo hirm bang:

icosx-smxl

2

B.- -sin 2x

1og (x'+ 1) Dao hhm f'(i) bang:

B 1+1n2 igt

^ {}ac hlm f'(10) l;iinl:

-+, I

-5 ln 10

c' .-D4o ham cap hai f'(0) biurg:

xt ln x Dao h}m cap hai f^le) b21g:

8.3 c 4 (D.5

CAu39: Hhm so f(x) = xe-* dat cuc tri tai didrn:

Ciu40: II)m sd f(x) = x' ln x dat cuc tri tai ditim:

2

(A.i ^

\_./ cos Lx

CAu35: Cho f(x) =

-1

(a.t

V \n2

CAu36: Cho f(x) =

A In10

Ciu37: Cho f(x) =

A 1

Ciu38: Cho f(x) =

A.2

0,=,

CAu41: H)m sd y = e" (a;e 0) c6 dao hirm cdp n lir:

A y(n) -"u* B y(") =a"e'* C ,(') :,!e" D y(') =n.e"*

CA,u42: Hdm s6 y = lnx c6 dao hl'rn c{p n l}r:

^ (n) n!

A y' ' =; B y(') = (-l)n.'g+ c v'"' = lf D' v(') = #

CAu43: Cho f(x) = xte ^ bat phuctng tlinh f'(x) 2 0 c6 tAp nghi0m th:

A (2; +co) (B; t0; 2l C ( 2; 4 D Ket qui kh6c

C6u4zt: Cho ftirm s6 y = "'"'')Bie,, thfrc rtit gon cua [,= ]'cos,\ - yinx - y" la:

A cosx.e'i"* B.2e'i"^ g'o ,." o^,t

-CAu45;D6 thi (I-) cfia hhrn so f(x) = lnx cit truc hoiir ih tai didm A, tidp tuydn cira (L) tai A cd phuong trinh l}:

\ )'

pHtJoNG rnixu ivru vA pHUoNG rniruH r,Ocanfr

ilf,ul: Phumg trinh 43*-2 =L6 cd nghiOm th:

3

A.x=*

Cf,u2: TAp nghiOrn cria phuorrg trinh: 2*'-'-o = I le,

I6

Cflu3: Phuong trinh 42**3 - 8o-* c6 nghiem l):

(A.): B : c I D.2

( ^t.;\-"

CAu4: Phuong trinh 0, 125.42'-i = I + I 6 nghidm lh:

(.8] "

^

A.3 8.4 c.s (d.e

Cflu5:!\gong trinh: 2' +2*t +2*-7 -3r -3x-r *3V e6nghi€m Id:

(4i2 B 3 c.4 D s

CAu6: !\.u*g tr)nh: 2r*-6 +2^-= = L7 c6 nghiem l):

@)-3 8.2 c.3 D.s

C&u7: TAp nghi€m cria phuong trinh:J'-1 + 53-'* = 26 li:

a {z; +} n {:; r'\-/ s} @p,:y D @

Cflu8: Phuong trinh: 3{+ 4* = 5^ c6 nghi0m li:

Cfiu9: Phucmg trinh: 9' + 6* = 2.4* c6 ngtri€m Ih:

Cflu10: Phuong trinh: ? = -x + 6 c6 nghi€m ld: \-/

CAutr?: Phuong trinh: logx + log(x- q); I co nghiem th:

A.7 8"8 C.9 @,1 ro

C&u13: Ph*ong trinh: lg(5 4 -"xt) = 31S* c6 nghiem li:

C&uL4: Phucrng tr'inh: ln x + ln i:x - Z) = 0 c6 rldv nghiclm?

C&ulS: Fhir<rng tlinh: [n(r * 1)+ln(x +]) hr(x +7)

Cfru16: Phuong rrinli: log, x + log, x +- log x = 1l c6 nghi0m li:

A.24 ts 36 c 45 @ uo

Cfrul7: Phrrcrng trinh: krg, x + 3log, 2 = 4 c6 rAp nflhi0m ii'r:

(ry {z; s} r {+; :} c {+; io} D q)

CAull: X6c dinh m dd phuong trinh: 4* -2m.2* + rn + 2 = A cd hai nghi€rn phAn biet? Ddp 6n tI:

I

CAu18: Phuong trinh: 19 (x' - 6x+ t) = fg (x - :)

@tir) n {:; +} c {+; s}

la

C&u19: Phuong trinh: 4-lgx i + = 2+lgx = 1 c6 t6p nghi6m li:

c6 tAp nghi0m th:

D.O

@ 1ro, rool n {t;:o}

{*','} D o

Cf,u20: Phrrcrng trinh: x-2*rog' = 10[]0 c6 tip nghi€rr l]r:

a {to; too} r {tc; zo}

C&u21: Phuong trinh: iog" x + iog* x = -? c6 tAp nghiOm lh:

a (zo; t+) n (tz; o) c' (s; z)

@tot B {3} c {z; s} D rt;

C6;u22: Fhuong trinh: 1 og, x = -x + 6 cti tAp nghidrn ih:

^ {LIoNG rRiNH ntfi vi leicenir

l) - )' 6

Caul: I:10 phuong tiinh: l;-:: o:' vdi x > y c6 mdy ngiri6m:' x' - sK *I = G

\L -L)

/'

i3t''-2'=5

cau2: Fle phuong tri'h:

1* _ u.r, +z = a c6 nghiem th:

A (3; a) B (rr 3) @)(r' ,) o (+: +)

v

C0u9: He phuong tri,,t,' {* -'

,

U

i.ln x + 1n y = 31,,6 t6 *ghi€m ld:

l'x+2v=-l

CAu3: I-16 phuohg tr)ntr: L' c6 may nghi0m?

[4'*" * 16

17^+y =4

CAu4: H0 phuong trinh: ]

^, ".,,,1 nghiOm th:

I 1.,:+ - =O.j

e (z; i) B (+: -3) g,i(r; z) o (s; -:)

eAus:[i0phuorrgrr;*, ]:*t:7 uoi xzycongiriem ia']

[trgx +lgy:1

a (a; :) n (o; t)

_ Q(s; z) D Kdt qua kh6c

llsxv=5

CAirS: FIo phuong tri"h,

iil _'.rr, = 6'tai a )'y cd nghiern lb? ,

a (roo; ro) n (soo; +) @ irooo, ,oo1 'D Kdrquikhdc

ciu7: He phuong rrinh: {:t .' yt =-20

^ v6i x z y c6 nghiem lh:

llogrx+log,y=3

a (:: :) @ t+, z) c (:v?: .,i: ) D Kel quri kiidc

a (4; +), (r; s) B (2, +),(zz:o+) c (+' 16) (s: i6) ,,,fu,J(o' t),(z;z)

r lr I

/ C 1-: 1000 !

w ltO )

D.@

caur0: rre phucrns rri,.,n, {31t

- - 11" = 5^ 6 nghiorn l)

[4lgx+3lgv=18

(b) qrr; iz;

I.' t'