Mathematics
Senior High
Resolved
紫かっこのついてるところの計算のやり方を教えてください
60(1)
1-
2
3
よって1/23s=
1-
-
1
31-
n
3n
+1=
3n+1-2n-3
2.3"
3n
3n+1-2n-3
La
#2 - (* 2 - 1) = =
(+)
下に
(-) +
したがって
S=-
4.3n-1
3n
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