已知方程k/(x+1)+3/(x+1)=6/(x^2-1)无解,那么k不等于几?知道方程k/(x+1)+3/(x+1)=6/(x^2-1)无解,求k的值.

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已知方程k/(x+1)+3/(x+1)=6/(x^2-1)无解,那么k不等于几?知道方程k/(x+1)+3/(x+1)=6/(x^2-1)无解,求k的值.已知方程k/(x+1)+3/(x+1)=6/(

已知方程k/(x+1)+3/(x+1)=6/(x^2-1)无解,那么k不等于几?知道方程k/(x+1)+3/(x+1)=6/(x^2-1)无解,求k的值.
已知方程k/(x+1)+3/(x+1)=6/(x^2-1)无解,那么k不等于几?
知道方程k/(x+1)+3/(x+1)=6/(x^2-1)无解,求k的值.

已知方程k/(x+1)+3/(x+1)=6/(x^2-1)无解,那么k不等于几?知道方程k/(x+1)+3/(x+1)=6/(x^2-1)无解,求k的值.
k/(x+1)+3/(x+1)=6/(x^2-1)
去分母,得
k(x-1)+3(x-1)=6 (#)
若原方程无解,则1或-1是方程(#)的解
但1显然不是,
把-1代入(#),得
-2k-6=6
所以k=-6

k/(x+1)+3/(x+1)=6/(x^2-1)
(k+3)/(x+1)=6/(x-1)(x+1)
k+3=1/(x-1),k=-3时,方程无解
则k≠-3

方程k/(x+1)+3/(x+1)=6/(x^2-1)无解即(k+3)x=k+9无解
则k+3=0,得k=-3

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