Mathematics
Senior High
Solved
すみません、途中式お願いします🥲
特に分子の変形がわかりません…。
(n+1)5'
6n+1
n.5"-1
6n
2
-{5(n+1)-6n}
>0
(n<5のとき),
(-n+5)
=0(n=5のとき)
<0
(n>5のとき)
Pn+1=
Pnt1-P,=(n+1)5"
6n+1
52-1
=
6n+1
57-1
6n+1
Answers
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