Mark the correct alternative in each of the following:If y=1+1x21-1x2, – InterviewSolution

1.	Mark the correct alternative in each of the following:If y=1+1x21-1x2, then dydx=(a) -4xx2-12 (b) -4xx2-1 (c) 1-x24x (d) 4xx2-1
Answer» Mark the correct alternative in each of the following: If $y = \frac{1 + \frac{1}{x^{2}}}{1 - \frac{1}{x^{2}}}$ , then $\frac{d y}{d x} =$ (a) $- \frac{4 x}{{(x^{2} - 1)}^{2}}$ (b) $- \frac{4 x}{x^{2} - 1}$ (c) $\frac{1 - x^{2}}{4 x}$ (d) $\frac{4 x}{x^{2} - 1}$

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