y=loga^lg(x^2-2x+3)有最大值,解不等式loga(x^2-5x+7)>0
问题描述:
y=loga^lg(x^2-2x+3)有最大值,解不等式loga(x^2-5x+7)>0
答
y=loga^lg(x^2-2x+3)有最大值,解不等式loga(x^2-5x+7)>0
a>1
x^2-5x+7>1
(x-2)(x-3)>0
x>3或x