Mathematics
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数3の極限の問題です。(3)の解き方を教えてください！
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例題 85 数列の極限〔2〕
次の極限値を求めよ。
12 +2²+3²+...+ n²
72³
(3) (1-1/2)(1-1/2)(1-1/21)
(1) lim
n→∞
lim(1
N18
n
(2) lim
N48
→例題84, IIB262.
1+3+5 + ･･･ +(2n-1)
2+4+6+・・・ +2n
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掛け算であることを利用して約分しました