!"# $% &'()*+
2 2
1
x
+
! "
1 (2 1)
1
x
+
# $ %& % ' () *+," -+, +,+ /0 "
-1 2 " + % " 340 5 % / + - 5 % *+, , " - +
!"# $, &'()
*+-6 7 / -+, !$+ # − + + 1 # # − + ≥ 8 1 # # − + 9 8
# 6 / -+, !$+ 4 2x− x+ 1 + 2(2 1)sin(2x− x+ − + =y 1) 2 0
!"# $, &'()
*+-!+, :/ +, - ; 5 ;40 " # -+, !+
0#< # = 9 # 0#< # − − 2x 2y− 23 0 = = / -+, !$+ ! 5" +,/ -+,>
" # -+, !+ # +, + !?+,+ ;"> $ +," " +
* " + -+ +," " + * " #
# !+, *+,, + - ; 5 ;40 @" % A 9)#)1 :/ +,
B 2x+ 2y z− + = 1 0
6 5A C $+ " " A C*+ :/ +, B 2 " + 5 ; % A D+ ;
> 5+AA
7 = / -+, !$+ :/ +, E & A " -+, +, x-1 y-1 z-5
:
2 = 1 = -6
!"# $, &'()
*+-D+ D" / *+ 4 sin
0 (tgx e xcos )x dx
π
+
# " "" F#F1F8F9FGFH" %C;/ -5"7 + * 5+ *+F I , 9
" "+ + / " # " F9J
!"# $ &'()*+
K(F7K(F"K( + ; ≤ $ , !+ + " 7 % "
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