2 2 2
2x −x−2 + +x x =3
1
3 2 ( ) sin sin 4 2
x cos x x
π
− +
=
9+ −t −(a+2)3+ −t +2a+ =1 0
m
2 2
π π
−
15.2x+ + ≥1 2x− +1 2x+
3x + 45.6x 9.2 x + 0
1;3
10
2
1
log (x +2x+1)=log (x +2 )x
3
2 3
x
2
2
2 3 27
x x− x =
Trang 2P D! ; 4 2 3 3
3
log (25x+ −1)=2 log (5+ x+ +1)
log (2x+1) log (2x+ +2)=6
(x+1) log x+4 logx x−16=0
0 10 6F 5(log 5 ) x2 log 5 x 10
x
log (x +3 )x <log (3x−1)
2
x
3
32
8
x
x
0 1
x
>
+
2
2
x x
+
>
+
" 5 6, # " ' : f x( )=xlog 2(x x>0,x≠1)
2
x
2
log (x +2x−3) log (+ x+3)>log (x−1)
log
x− >
4
x