Mathematics
Senior High
下の2行の変形がわかりません。
Sam=(bi+b2)+(bs+b4)+
+(b2m-1+ b2m)
一 ー
21+1
21+2
m
=2(ba-1+b2)=D>(11)F-2 1og
+(-1"-1 log
1=1
1=1
27-1
21
21+1
21-1
21+2
m
2(log
三
27
Answers
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ありがとうございます!