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If ax^(2)+bx+4 attains its minimum val...

If `ax^(2)+bx+4` attains its minimum value -1 at x=1 , then the values of a and b are respectively a)`5,-10` b)`5,-5` c)5,5 d)`10,-5`

A

`5,-10`

B

`5,-5`

C

5,5

D

`10,-5`

Text Solution

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The correct Answer is:
A
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