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Let f(x)={{:(Ax,,","x lt 1),(Ax^(2)+Bx+4...

Let `f(x)={{:(Ax,,","x lt 1),(Ax^(2)+Bx+4,,","x ge 1):}`
If f is differentiable for all x, then

A

`A=2,B=-2`

B

`A=-4,B=4`

C

`A=1,B=-1`

D

`A=4,B=-4`

Text Solution

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The correct Answer is:
D
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