If \[f(x)\,=\,\left\{ \begin{matrix} \frac{\sqrt{1+kx}-\sqrt{1-kx}}{x} & \text{,for}-1\le x

If \[f(x)\,=\,\left\{ \begin{matrix} \frac{\sqrt{1+kx}-\sqrt{1-kx

1.	If \[f(x)\,=\,\left\{ \begin{matrix} \frac{\sqrt{1+kx}-\sqrt{1-kx}}{x} & \text{,for}-1\le x
A.	? 4
B.	? 3
C.	? 2
D.	? 1
Answer» D. ? 1

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If \[f(x)\,=\,\left\{ \begin{matrix} \frac{\sqrt{1+kx}-\sqrt{1-kx}}{x} & \text{,for}-1\le x

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