f(x)=x-4分之3x-2的值域
问题描述:
f(x)=x-4分之3x-2的值域
答
f(x) = (3x-2)/(x-4) = (3x-12+10)/(x-4) = 3 + 10/(x-4)
10/(x-4)≠0
3 + 10/(x-4)≠3
f(x)值域(-∞,3),(3,+∞)