Mark the correct alternative in each of the following: \( \lim _{x \rightarrow a} \frac{x^{n}-a^...
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0Mark the correct alternative in each of the following:
\( \lim _{x \rightarrow a} \frac{x^{n}-a^{n}}{x-a} \) is equal to
(A) \( n a^{n} \)
(B) \( n a^{n-1} \)
(C) \( n a \)
(D) 1
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