> 数学 >
《1/(a-b)-1/(a+b)》/ab/a2-b2计算过程
人气:144 ℃ 时间:2020-02-06 04:27:55
解答
[1/(a-b)-1/(a+b)]÷ [ab/(a²-b²)]
=[1/(a-b)-1/(a+b)]× [(a²-b²)/ab]
=[a+b -(a-b)]÷(ab)
=2b÷(ab)
=2/a
推荐
猜你喜欢
© 2024 79432.Com All Rights Reserved.
电脑版|手机版