Mathematics
Senior High
Solved
至急です!
クリアー数学Bの問題なのですが
式変形の仕方が分からず困っています!
2(2n-1-1)
=1+2.
-(2n-1).2"
2-1
=(3-2n) 2"-3
したがって S=(2-3)・2"+3
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