Mathematics
Senior High
(2)の答えの過程をどなたか教えてくださいm(_ _)m
| 次の等比数列{an}の一般項を求めよ。
(1) 5,10,20, 40,
12:42.
an
An = ( 5 = 24²
(2)-2,2,-2, 2,
x-x-1
......
キ
An= -2.(-1)^² = -2 (-1)^
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