Tolong Jawabanya yang lengkap ??Hitunglah jumlah semua bilangan bulat antara 100 dan 300 yang habis di bagi 5 !
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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