Question

当k=多少时,方程3 3ˉˉ =1 - ˉˉˉx-1 1-x会产生增根打乱了.......当k=多少时,方程x-1分之3

Answer 1

3/(x-1)=1-k/(1-x)

2边都乘以x-1,得

3=(x-1)+k

x=4-k

会产生增根,则解是x=1

4-k=1

k=3