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