试题与答案

已知函数f(x)=x2+ax+4x(x≠0).(1)若f(x)为奇函数,求a的值

题型:解答题

题目:

已知函数f(x)=
x2+ax+4
x
(x≠0)

(1)若f(x)为奇函数,求a的值;
(2)若f(x)在[3,+∞)上恒大于0,求a的取值范围.

答案:

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