f(x)=√(1-x^2)
1-x^2≥0
-1≤x≤1
√(1-x^2)与1-x^2有相同的单调性
1-x^2开口向下,极点为(0,1)
[-1,0],f(x)=1-x^2单调递增,f(x)=√(1-x^2)单调递增
[0,1],f(x)=1-x^2单调递减,f(x)=√(1-x^2)单调递减
f(x)=√(1-x^2)
1-x^2≥0
-1≤x≤1
√(1-x^2)与1-x^2有相同的单调性
1-x^2开口向下,极点为(0,1)
[-1,0],f(x)=1-x^2单调递增,f(x)=√(1-x^2)单调递增
[0,1],f(x)=1-x^2单调递减,f(x)=√(1-x^2)单调递减