y=x2-3x+2/ x2+2x-3值域
问题描述:
y=x2-3x+2/ x2+2x-3值域
y=(x²-3x+2)/ (x²+2x-3)的值域是什么
答
y=(x²-3x+2)/ (x²+2x-3)=[(x²+2x-3)-5x+5]/(x²+2x-3)=1+5(x-1)/(x-1)(x+3)=1+1/(x+3)
y=(x²-3x+2)/ (x²+2x-3)的值域是 y≠1