Penjelasan dengan langkah-langkah:
3, 7, 11, ....39
U1 = 3
U2 = 7
b = U2-U1 = 7 - 3 = 4
Un = 39
Un = U1 + ( n - 1 ) b
39 = 3 + ( n - 1 ) x 4
36 = 4n - 4
40 = 4n
n = 10
Banyaknya suku = 10
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Penjelasan dengan langkah-langkah:
Penjelasan dengan langkah-langkah:
3, 7, 11, ....39
U1 = 3
U2 = 7
b = U2-U1 = 7 - 3 = 4
Un = 39
Un = U1 + ( n - 1 ) b
39 = 3 + ( n - 1 ) x 4
36 = 4n - 4
40 = 4n
n = 10
Banyaknya suku = 10