Question

求这道题的解法：若分式-X的平方+6X-M分之2X-3无论X取何值总有意义,求M的取值范围!

Answer 1

(2x-3)/(-x^2+6x-m)无论x取何值总有意义

-x^2+6x-m=0是,方程无解

则,36-4m＜0

m＞9

x+(1/y)=z+(1/x)=1

y=1/(1-x)

z=1-(1/x)=(x-1)/x

y+(1/z)=1/(1-x)+x/(x-1)=(x-1)/(x-1)=1