已知二次函數(shù)y=2x2-9x-34.當(dāng)自變量x取兩個(gè)不同的值x1,x2時(shí).函數(shù)值相等.則當(dāng)自變量x取x1+x2時(shí)的函數(shù)值應(yīng)當(dāng)與 A.x=1時(shí)的函數(shù)值相等 B.x=0時(shí)的函數(shù)值相等 C.x=的函數(shù)值相等 D.x= 的函數(shù)值相等 查看更多

 

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已知二次函數(shù)y=2x2+9x+34,當(dāng)自變量x取兩個(gè)不同的值x1,x2時(shí),函數(shù)值相等,則當(dāng)自變量x取x1+x2時(shí)的函數(shù)值與.

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A.x=1時(shí)的函數(shù)值相等

B.x=0時(shí)的函數(shù)值相等

C.x=時(shí)的函數(shù)值相等

D.x=時(shí)的函數(shù)值相等

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已知二次函數(shù)y=2x2+9x+34,當(dāng)自變量x取兩個(gè)不同的值x1、x2時(shí),函數(shù)值相等,則當(dāng)自變量x取x1+x2時(shí)的函數(shù)值與(  ).

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A.x=1時(shí)的函數(shù)值相等

B.x=0時(shí)的函數(shù)值相等

C.x=時(shí)的函數(shù)值相等

D.x=-時(shí)的函數(shù)值相等

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已知二次函數(shù)y=2x2+9x+34,當(dāng)自變量x取兩個(gè)不同的值x1、x2時(shí),函數(shù)值相等,則當(dāng)自變量x取x1+x2時(shí)的函數(shù)值與

[  ]

A.x=1時(shí)的函數(shù)值相等

B.x=0時(shí)的函數(shù)值相等

C.x=時(shí)的函數(shù)值相等

D.x=-時(shí)的函數(shù)值相等

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已知二次函數(shù)y=2x2+9x+34,當(dāng)自變量x取兩個(gè)不同的值x1、x2時(shí),函數(shù)值相等,則當(dāng)自變量x取x1+x2時(shí)的函數(shù)值與

[  ]

A.x=1時(shí)的函數(shù)值相等

B.x=0時(shí)的函數(shù)值相等

C.

D.

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已知二次函數(shù)y=2x2+9x+34,當(dāng)自變量x取兩個(gè)不同的值x1,x2時(shí),函數(shù)值相等,則當(dāng)自變量x取x1+x2時(shí)的函數(shù)值與( 。
A、x=1時(shí)的函數(shù)值相等
B、x=0時(shí)的函數(shù)值相等
C、x=
1
4
時(shí)的函數(shù)值相等
D、x=-
9
4
時(shí)的函數(shù)值相等

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