计算题:(1)(3b24a3)2•(-32a2b)3;(2)12m-1m+n(m+n2m-m-n);(3)1-(1-11-x)2÷x2-x+1x2-2x+1-数学

题目简介

计算题:(1)(3b24a3)2•(-32a2b)3;(2)12m-1m+n(m+n2m-m-n);(3)1-(1-11-x)2÷x2-x+1x2-2x+1-数学

题目详情

计算题:
(1) (
3b2
4a3
)2•(-
3
2
a2b)3
;(2) 
1
2m
-
1
m+n
(
m+n
2m
-m-n)
;(3) 1-(1-
1
1-x
)2÷
x2-x+1
x2-2x+1
题型:解答题难度:中档来源:不详

答案

(1) (
3b2
4a3
)2•(-class="stub"3
2
a2b)3

=
9b4
16a6
class="stub"27
8
a6b3,
=class="stub"243
128
b7;

(2) class="stub"1
2m
-class="stub"1
m+n
(class="stub"m+n
2m
-m-n)

=class="stub"1
2m
-class="stub"1
2m
+1,
=1;

(3) 1-(1-class="stub"1
1-x
)2÷
x2-x+1
x2-2x+1

=1-(class="stub"1-x-1
1-x
)2•
(x-1)2
x2-x+1

=1-
x2
(x-1)2
(x-1)2
x2-x+1

=1-
x2
x2-x+1

=class="stub"1-x
x2-x+1

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