(x^2-4x+1)/(3x^2-7x+1)
问题描述:
(x^2-4x+1)/(3x^2-7x+1)
答
∵(x^2-4x+1)/(3x^2-7x+1)<1,∴[(x^2-4x+1)-(3x^2-7x+1)]/(3x^2-7x+1)<0,∴(-2x^2+3x)/(3x^2-7x+1)<0,∴(2x^2-3x)/(3x^2-7x+1)>0,∴x(x-3/2)/[x^2-(7/3)x+1/3]...