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(-∞,1] [1,2)
f(x)=x2[0,3] f(x)=1/x[-1,1] f(x)=|x|[-1,1]
[0,1] [1,2] [-2,-1] [-1,0]
(1,1.25) (1.25,1.5) (1.5,1.75) (1.75,2)
(-2,-1) (-1,0) (0,1) (1,2)
[0,1] [1,2] [-2,-1] [-1,0]
(﹣2,﹣1) (﹣1,0) (0,1) (1,2)
f(x)是偶函数,递增区间是(0,+∞) f(x)是偶函数,递减区间是(-∞,1) f(x)是奇函数,递减区间是(-1,1) f(x)是奇函数,递增区间是(-∞,0)
f(x)=x[0,3] f(x)=1/x[-1,1] f(x)=|x|[-1,1]
[0,1] [1,2] [﹣2,﹣1] [﹣1,0]