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If f(x)={(sqrt(1+k x)-sqrt(1-k x))/x for...

If `f(x)={(sqrt(1+k x)-sqrt(1-k x))/x` for `1 le x< 0 and 2x^2+3x-2 for0 le x le 1` is continuous at `x-0` then `k`

A

-1

B

-2

C

-3

D

-4

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