A) n
B) 1
C) ?1
D) None of these
Correct Answer: A
Solution :
\[\underset{x\to 0}{\mathop{\lim }}\,\,\frac{(1+nx+{{\,}^{n}}{{C}_{2}}{{x}^{2}}+...\text{higher powers of }x\text{ to }{{x}^{n}})-1}{x}=n\]. Aliter : Apply L-Hospital?s rule.
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