作业帮判断函数f（x）=x²,x属于（符号打不出）[-4,2]的单调性,并求出它的单调区间?
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判断函数f（x）=x²,x属于（符号打不出）[-4,2]的单调性,并求出它的单调区间?
判断函数f（x）=x²,x属于（符号打不出）[-4,2]的单调性,并求出它的单调区间?
判断函数f（x）=x²,x属于（符号打不出）[-4,2]的单调性,并求出它的单调区间?
[-4,0]单调递减,(0,2]单调递增