A.其導(dǎo)函數(shù)小于0 B.其二階導(dǎo)函數(shù)大于0 C.其導(dǎo)函數(shù)大于0 D.其二階導(dǎo)函數(shù)小于0
A.函數(shù)大于0 B.其二階導(dǎo)函數(shù)大于0 C.其導(dǎo)函數(shù)大于0 D.其二階導(dǎo)函數(shù)小于0
A.(1,1) B.(-1,1) C.(1,-1) D.(2,3)