函数f(x)=ax2+bx+c是偶函数的条件是______.
人气:104 ℃ 时间:2019-10-19 18:12:26
解答
∵f(x)=ax
2+bx+c是偶函数,
∴f(-x)=f(x),即ax
2-bx+c=ax
2+bx+c,
则
,即a、c∈R,且b=0,
故答案为:a、c∈R,且b=0.
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