Define f(x) = {{:(x^(2)+bx+c , ",",x lt ...

Define `f(x) = {{:(x^(2)+bx+c , ",",x lt 1),(x,",",x ge 1):}`. If `f(x)` is differentiable at `x = 1`,
then `(b - c) =`

A

-2

B

0

C

1

D

2

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The correct Answer is:

A

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