函数y=log1/3(5+4x-x2)的值域,

问题描述:

函数y=log1/3(5+4x-x2)的值域,

5+4x-x2=-(x-2)^2+1≥1
log1/3(5+4x-x2)≤0

1

5+4x-x2=-(x-2)^2+1≥1
log1/3(5+4x-x2)≤0