Question

8、不等式|x-2|+|x+1|/|x-1|=|(x^2-2x+3)/(x-1)|的解集是?

Answer 1

当x>2,(x-2)(x-1)+(x+1)=(x-1)^2+2,

x^2-3x+2+x+1=x^2-2x+3→3=3,成立.

当1=