Mathematics
Senior High
Solved
2段目から3段目への計算方法がわからないので教えて欲しいです
22
(1) (5k+4)=5Σk+Σ 4
©=5₂
k=1
k=1 ⠀ - k=¹0001 <(I—"8)
=5+(+1)+4M
=1/1/2m(5m
(5n+13)
644
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