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If the derivative of the function f(x) ...

If the derivative of the function `f(x) ={ax^2+b , x lt -1 and bx^2 +ax+4,x leq -1` is everywhere continuous, then-

A

`a=3, b=2`

B

`a=2, b=3`

C

`a=-2, b=-3`

D

`a=-3, b=-2`

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The correct Answer is:
B
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