Let alpha and beta be the roots of ax^2+...

Let `alpha and beta` be the roots of `ax^2+bx+c=0`
Then `lim_( x to alpha) (1- cos (ax^2+bx+c))/(x-alpha)^2` is equal to

A

`a^2/2(alpha - beta)^2`

B

0

C

`a^2/2(alpha +beta)^2`

D

`1/2(alpha - beta)^2`

Verified by Experts

The correct Answer is:

A

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