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If f(x) = {{:( e^(x) +ax ,"for " x lt 0...

If f(x) = ` {{:( e^(x) +ax ,"for " x lt 0 ),( b(x-1) ^(2) ,"for " xge 0):}, ` is differentiable at x =0,then (a,b) is

A

(-3,-1)

B

(-3,1)

C

(3,1)

D

(3,-1)

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The correct Answer is:
B
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