October 2018 1 18 Report
Tolong donk!! bsok di kumpul
1. hitunglah jumlah n bilangan pertama dari deret aritmatika berikut.
a. n=15, a=-6,dan b=3
b. n=27,a=38,dan b=-2
c. 6,9,12...; n=9
d. -10,-2,6,14,...; n=7

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