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[单选题]A.当n为偶数时,x=0是f(x)的极大值点B.当n为奇数时,x=0是f(x)的极小值点C.当n为奇数时,x=0是f(x)的极大值点D.当n为偶数时,
[单选题]A.对任意x,f′(x)>0B.对任意x,f′(x)≤0C.函数-f(-x)单调增加D.函数f(-x)单调增加
[单选题]A.当n为偶数时,x=0是f(x)的极大值点B.当n为奇数时,x=0是f(x)的极小值点C.当n为奇数时,x=0是f(x)的极大值点D.当n为偶数时,
[单选题]A.nB.-27nC.3nD.-3n
[单选题]A.当n为偶数时,x=0是f(x)的极大值点B.当n为奇数时,x=0是f(x)的极小值点C.当n为奇数时,x=0是f(x)的极大值点D.当n为偶数时,