Jawaban:
Un = 8n + 4
Penjelasan dengan langkah-langkah:
Barisan 12, 20, 28
a = 12
b = 20 - 12
b = 8
Un = a + ( n - 1)b
Un = 12 + ( n - 1)8
Un = 12 + 8n -8
Mari kita uji
U1 = 8(1) + 4
U1 = 8 + 4
U1 = 12
U2 = 8(2) + 4
U2 = 16 + 4
U2 = 20
U3 = 8(3) + 4
U3 = 24 + 4
U3 = 28
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Verified answer
Jawaban:
Un = 8n + 4
Penjelasan dengan langkah-langkah:
Barisan 12, 20, 28
a = 12
b = 20 - 12
b = 8
Un = a + ( n - 1)b
Un = 12 + ( n - 1)8
Un = 12 + 8n -8
Un = 8n + 4
Mari kita uji
Un = 8n + 4
U1 = 8(1) + 4
U1 = 8 + 4
U1 = 12
U2 = 8(2) + 4
U2 = 16 + 4
U2 = 20
U3 = 8(3) + 4
U3 = 24 + 4
U3 = 28