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If y=a x^2+b x+c represents the curve gi...

If `y=a x^2+b x+c` represents the curve given in the figure and `b^2=2(b+2a c),` where `a!=0` and `A P=3` units, then `O P=` `3/2` (b) `3/4` (c) 3 (d) 6

A

`3/2`

B

`3/4`

C

3

D

6

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