Who 来救我(一课一练七年级的暑期作业)(x+1)^4+(x^-1)^+(x-1)^4
来源:学生作业帮助网 编辑:作业帮 时间:2024/07/04 17:01:03
![Who 来救我(一课一练七年级的暑期作业)(x+1)^4+(x^-1)^+(x-1)^4](/uploads/image/z/11590383-39-3.jpg?t=Who+%E6%9D%A5%E6%95%91%E6%88%91%28%E4%B8%80%E8%AF%BE%E4%B8%80%E7%BB%83%E4%B8%83%E5%B9%B4%E7%BA%A7%E7%9A%84%E6%9A%91%E6%9C%9F%E4%BD%9C%E4%B8%9A%29%28x%2B1%29%5E4%2B%28x%5E-1%29%5E%2B%28x-1%29%5E4)
Who 来救我(一课一练七年级的暑期作业)(x+1)^4+(x^-1)^+(x-1)^4
Who 来救我(一课一练七年级的暑期作业)
(x+1)^4+(x^-1)^+(x-1)^4
Who 来救我(一课一练七年级的暑期作业)(x+1)^4+(x^-1)^+(x-1)^4
题目抄错了吧
(x+1)^4+(x^-1)^+(x-1)^4=(x^-1)^(不知道几次方)
(x^-1)^=(x^2-1)^2?
(x+1)^4+(x^2-1)^2+(x-1)^4
=(x+1)^4+[(x-1)(x+1)]^2+(x-1)^4
=[(x+1)+(x-1)]^2-(x^2-1)^2
=[2x+(x^2-1)][2x-(x^2-1)]
=-(x-1)^2*(x^2+2x-1)
题目完全错误
恩,楼主题错了
就是,几次方都没标清。
(x+1)的平方 乘以(5x+1) 貌似是这样的
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