tolong pake cara yaa....
Matematika
agustinadiah211
Pertanyaan
tolong pake cara yaa....
1 Jawaban
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1. Jawaban samandaa28
1) Sn = n/2 (2a + (n-1) b)
= n/2 (2.5 + (n -1) 4)
= 15/2 (10+(15-1)4)
= 15/2 (114)
= 855