> 数学 >
x(x的2次方-1)分之(x-1)的2次方*x-x的2次方分之x+x的2次方=()
人气:454 ℃ 时间:2020-05-28 19:40:38
解答
=(x-1)²/x(x+1)(x-1)×[-x(x+1)/x(x-1)]
=(x-1)/x(x+1)×[-(x+1)/(x-1)]
=-1/x
推荐
猜你喜欢
© 2024 79432.Com All Rights Reserved.
电脑版|手机版