A.二階導(dǎo)數(shù)小于0 B.二階導(dǎo)數(shù)大于0 C.一階導(dǎo)數(shù)小于0 D.一階導(dǎo)數(shù)大于0
A.一階導(dǎo)數(shù)大于0,二階導(dǎo)數(shù)小于0 B.一階導(dǎo)數(shù)小于0,二階導(dǎo)數(shù)大于0 C.一階導(dǎo)數(shù)大于0,二階導(dǎo)數(shù)大于0 D.一階導(dǎo)數(shù)小于0,二階導(dǎo)數(shù)小于0
A.先低后高 B.先高后低 C.逐漸升高 D.逐漸降低