The minimum value of 2x^2 +x-1 is: a)-1/...

The minimum value of `2x^2 +x-1` is: a)`-1/4` b)`3/2` c)`-9/8` d)`9/4`

A

`-1/4`

B

`3/2`

C

`(-9)/8`

D

`9/4`

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The correct Answer is:

C

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