计算:(1)(2-π)0-2-3+(15)-1(2)x-2x2-1÷2x+2x2+2x+1+1x-1.-数学

题目简介

计算:(1)(2-π)0-2-3+(15)-1(2)x-2x2-1÷2x+2x2+2x+1+1x-1.-数学

题目详情

计算:
(1)(
2
)0-2-3+(
1
5
)-1

(2)
x-2
x2-1
÷
2x+2
x2+2x+1
+
1
x-1
题型:解答题难度:中档来源:不详

答案

(1)原式=1-class="stub"1
8
+5
=6-class="stub"1
8

=class="stub"47
8


(2)原式=class="stub"x-2
(x+1)(x-1)
×
(x+1)2
2(x+1)
+class="stub"1
x-1

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

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

=class="stub"x
2(x-1)

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