Penjelasan dengan langkah-langkah:
2, 6, 12, 20, ...
+4 +6 +8
+2 +2
Menggunakan Rumus Aritmetika Bertingkat :
2a = 2
a = 1
3a + b = 4
3(1) + b = 4
b = 1
a + b + c = 2
1 + 1 + c = 2
c = 0
Maka :
Un = an² + bn + c
U300 = 1 (300)² + 1(300) + 0
U300 = 90.000 + 300
U300 = 90 300 (c)
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Penjelasan dengan langkah-langkah:
2, 6, 12, 20, ...
+4 +6 +8
+2 +2
Menggunakan Rumus Aritmetika Bertingkat :
2a = 2
a = 1
3a + b = 4
3(1) + b = 4
b = 1
a + b + c = 2
1 + 1 + c = 2
c = 0
Maka :
Un = an² + bn + c
U300 = 1 (300)² + 1(300) + 0
U300 = 90.000 + 300
U300 = 90 300 (c)