作业帮计算:(1)(b-a)/(a²-b²)=_____；(2)1/x - 1/(x+1)=_____.
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计算:(1)(b-a)/(a²-b²)=_____；(2)1/x - 1/(x+1)=_____.
计算:(1)(b-a)/(a²-b²)=_____；(2)1/x - 1/(x+1)=_____.
计算:(1)(b-a)/(a²-b²)=_____；(2)1/x - 1/(x+1)=_____.
(1)(b-a)/(a²-b²)
=(b-a)/(a+b)(a-b)
=-1/(a+b)
1/x - 1/(x+1)
=(x+1-x)/x(x+1)
=1/(x²+x)
如追加其它问题,
(1)-1/(a+b)
(2)1/x(x+1)