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　次の各問に答えよ．
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\item[(1)]$a$が正の実数のとき$\displaystyle\lim_{n \to \infty}{(1+a^n)}^{\frac{1}{n}}$
を求めよ．
\item[(2)]定積分
$\displaystyle\int_1^{\sqrt3}\displaystyle\frac{1}{x^2}\log\sqrt{1+x^2}dx$の値を求めよ．
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