已知函數(shù)f（x）=ax2+（a-2）x+b定義域為（b，a-1）是偶函數(shù)，則函數(shù)f（x）的值域為_．
已知函數(shù)f（x）=ax2+（a-2）x+b定義域為（b，a-1）是偶函數(shù)，則函數(shù)f（x）的值域為______．
數(shù)學(xué)人氣：991 ℃時間：2019-08-19 21:59:08
優(yōu)質(zhì)解答
∵函數(shù)f（x）=ax2+（a-2）x+b是偶函數(shù)，且定義域為（b，a-1）∴b=1-a ①∵f（-x）=f（x）∴ax2-（a-2）x+b=ax2+（a-2）x+b x∈（b，a-1）∴-（a-2）x≡（a-2）x∴2-a=a-2即a=2 ②由①...
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