1.已知非零有理数x,y满足x²-4xy+4y²=0,则(x-y)/(x+y)=?2.若1/a+1/b=1/(a+b),则b/a+a/b的值为?3.若1/(2y²+3y+7)=1/8,则1/(4y²+6y-9)的值为?4.有理数x,y满足xy=1,设M=1/(1+x)+1/(1+y),N=x/(1+x)
来源:学生作业帮助网 编辑:作业帮 时间:2024/07/19 08:43:20
![1.已知非零有理数x,y满足x²-4xy+4y²=0,则(x-y)/(x+y)=?2.若1/a+1/b=1/(a+b),则b/a+a/b的值为?3.若1/(2y²+3y+7)=1/8,则1/(4y²+6y-9)的值为?4.有理数x,y满足xy=1,设M=1/(1+x)+1/(1+y),N=x/(1+x)](/uploads/image/z/8801434-10-4.jpg?t=1.%E5%B7%B2%E7%9F%A5%E9%9D%9E%E9%9B%B6%E6%9C%89%E7%90%86%E6%95%B0x%2Cy%E6%BB%A1%E8%B6%B3x%26sup2%3B-4xy%2B4y%26sup2%3B%3D0%2C%E5%88%99%EF%BC%88x-y%29%2F%EF%BC%88x%2By%EF%BC%89%3D%3F2.%E8%8B%A51%2Fa%2B1%2Fb%3D1%2F%28a%2Bb%29%2C%E5%88%99b%2Fa%2Ba%2Fb%E7%9A%84%E5%80%BC%E4%B8%BA%3F3.%E8%8B%A51%2F%EF%BC%882y%26sup2%3B%2B3y%2B7%EF%BC%89%3D1%2F8%2C%E5%88%991%2F%EF%BC%884y%26sup2%3B%2B6y-9%EF%BC%89%E7%9A%84%E5%80%BC%E4%B8%BA%3F4.%E6%9C%89%E7%90%86%E6%95%B0x%2Cy%E6%BB%A1%E8%B6%B3xy%3D1%2C%E8%AE%BEM%3D1%2F%EF%BC%881%2Bx%EF%BC%89%2B1%2F%EF%BC%881%2By%EF%BC%89%2CN%3Dx%2F%EF%BC%881%2Bx%EF%BC%89)
xTnA~248+-);bc֔m/R+ы$HØ]zWbmfwBcdoup6V^4S9ǶX{3]?76+̀"P}AThhMeՁJMMr($S3D9wggW !lЮ2?Î*1*PU
<