Jawabanmu

Jawaban paling cerdas!
2014-04-28T21:52:08+07:00
105, ..., dst, sampai 295

Un = a + (n - 1) b
295 = 105 + (n - 1) 5
295 = 105 + 5n - 5
295 - 100 = 5n
195 = 5n
39 = n

Jumlah semua bilangan

S = a + Un n/2
S = 105 + 295 29/2
S = 400 29/2
S = 200 29
S = 5800
1 5 1