問題文全文(内容文)：
定積分を用いて、次の極限値を求めよ。
(1) $\displaystyle \lim_{n\to\infty}\dfrac{1}{n}\left(\sin\dfrac{\pi}{2n}+\sin\dfrac{2\pi}{2n}+\sin\dfrac{3\pi}{2n}+\cdots+\sin\dfrac{n\pi}{2n}\right)$
(2) $\displaystyle \lim_{n\to\infty}\dfrac{1}{n}\left\{\left(\dfrac{n}{n}\right)^2+\left(\dfrac{n}{n+1}\right)^2+\left(\dfrac{n}{n+2}\right)^2+\cdots+\left(\dfrac{n}{2n-1}\right)^2\right\}$
(3) $\displaystyle \lim_{n\to\infty}\left(\dfrac{1}{n^2+1^2}+\dfrac{2}{n^2+2^2}+\dfrac{3}{n^2+3^2}+\cdots+\dfrac{n}{n^2+n^2}\right)$
(4) $\displaystyle \lim_{n\to\infty}\dfrac{1}{n^2}\{(\sqrt{1}+\sqrt{n})^2+(\sqrt{2}+\sqrt{n})^2+\cdots+(\sqrt{n}+\sqrt{n})^2\}$
定積分を用いて、次の極限値を求めよ。
(1) $\displaystyle \lim_{n\to\infty}\dfrac{1}{n}\left(\sin\dfrac{\pi}{2n}+\sin\dfrac{2\pi}{2n}+\sin\dfrac{3\pi}{2n}+\cdots+\sin\dfrac{n\pi}{2n}\right)$
(2) $\displaystyle \lim_{n\to\infty}\dfrac{1}{n}\left\{\left(\dfrac{n}{n}\right)^2+\left(\dfrac{n}{n+1}\right)^2+\left(\dfrac{n}{n+2}\right)^2+\cdots+\left(\dfrac{n}{2n-1}\right)^2\right\}$
(3) $\displaystyle \lim_{n\to\infty}\left(\dfrac{1}{n^2+1^2}+\dfrac{2}{n^2+2^2}+\dfrac{3}{n^2+3^2}+\cdots+\dfrac{n}{n^2+n^2}\right)$
(4) $\displaystyle \lim_{n\to\infty}\dfrac{1}{n^2}\{(\sqrt{1}+\sqrt{n})^2+(\sqrt{2}+\sqrt{n})^2+\cdots+(\sqrt{n}+\sqrt{n})^2\}$
単元：
#積分とその応用#定積分#数学(高校生)#数Ⅲ
指導講師：
理数個別チャンネル
問題文全文(内容文)：
定積分を用いて、次の極限値を求めよ。
(1) $\displaystyle \lim_{n\to\infty}\dfrac{1}{n}\left(\sin\dfrac{\pi}{2n}+\sin\dfrac{2\pi}{2n}+\sin\dfrac{3\pi}{2n}+\cdots+\sin\dfrac{n\pi}{2n}\right)$
(2) $\displaystyle \lim_{n\to\infty}\dfrac{1}{n}\left\{\left(\dfrac{n}{n}\right)^2+\left(\dfrac{n}{n+1}\right)^2+\left(\dfrac{n}{n+2}\right)^2+\cdots+\left(\dfrac{n}{2n-1}\right)^2\right\}$
(3) $\displaystyle \lim_{n\to\infty}\left(\dfrac{1}{n^2+1^2}+\dfrac{2}{n^2+2^2}+\dfrac{3}{n^2+3^2}+\cdots+\dfrac{n}{n^2+n^2}\right)$
(4) $\displaystyle \lim_{n\to\infty}\dfrac{1}{n^2}\{(\sqrt{1}+\sqrt{n})^2+(\sqrt{2}+\sqrt{n})^2+\cdots+(\sqrt{n}+\sqrt{n})^2\}$
定積分を用いて、次の極限値を求めよ。
(1) $\displaystyle \lim_{n\to\infty}\dfrac{1}{n}\left(\sin\dfrac{\pi}{2n}+\sin\dfrac{2\pi}{2n}+\sin\dfrac{3\pi}{2n}+\cdots+\sin\dfrac{n\pi}{2n}\right)$
(2) $\displaystyle \lim_{n\to\infty}\dfrac{1}{n}\left\{\left(\dfrac{n}{n}\right)^2+\left(\dfrac{n}{n+1}\right)^2+\left(\dfrac{n}{n+2}\right)^2+\cdots+\left(\dfrac{n}{2n-1}\right)^2\right\}$
(3) $\displaystyle \lim_{n\to\infty}\left(\dfrac{1}{n^2+1^2}+\dfrac{2}{n^2+2^2}+\dfrac{3}{n^2+3^2}+\cdots+\dfrac{n}{n^2+n^2}\right)$
(4) $\displaystyle \lim_{n\to\infty}\dfrac{1}{n^2}\{(\sqrt{1}+\sqrt{n})^2+(\sqrt{2}+\sqrt{n})^2+\cdots+(\sqrt{n}+\sqrt{n})^2\}$
投稿日：2026.08.08
