Mathematics
Senior High
Solved
ここの解き方教えて欲しいです!
答えは2枚目にあります!
次の和Sを求めよ。
S=1・1+2・3+3・+・・・・・・ +n3n-1
p.94 練習 34
/{3"
· {3″ · (2n − 1) + 1}
-
等差数列x等比数列の和
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