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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=2,b=3

B

a=3,b=2

C

a=--2,b=-3

D

a=-3,b=-2

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A
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