题目

An old friend of my sister's always helps my brother andwithEnglish. A . I; our B . me; ours C . I; my D . me; our 答案:D设函数. (Ⅰ)试问函数f(x)能否在x= -1时取得极值?说明理由; (Ⅱ)若a= -1,当x∈[-3,4]时,函数f(x)与g(x)的图像有两个公共点,求c的取值范围.
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