> 数学 >
计算a²/(a-1)-a-1的值
人气:480 ℃ 时间:2020-04-15 17:54:36
解答
=a²/(a-1)-(a+1)
=a²/(a-1)-(a+1)(a-1)/(a-1)
=a²/(a-1)-(a²-1)/(a-1)
=[a²-(a²-1)]/(a-1)
=1/(a-1)
推荐
猜你喜欢
© 2024 79432.Com All Rights Reserved.
电脑版|手机版