Penjelasan dengan langkah-langkah:
10 , 30 , 50 , 70 , ....
a = 10
b = 30 - 10 = 20
Rumus suku :
Un = a + (n - 1).b
Un = 10 + (n - 1).20
Un = 10 + 20n - 20
Un = 20n - 10
U50 :
U50 = 20.50 - 10
U50 = 1000 - 10
U50 = 990
U150 :
U150 = 20.150 - 10
U150 = 3000 - 10
U150 = 2990
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Penjelasan dengan langkah-langkah:
10 , 30 , 50 , 70 , ....
a = 10
b = 30 - 10 = 20
Rumus suku :
Un = a + (n - 1).b
Un = 10 + (n - 1).20
Un = 10 + 20n - 20
Un = 20n - 10
U50 :
U50 = 20.50 - 10
U50 = 1000 - 10
U50 = 990
U150 :
U150 = 20.150 - 10
U150 = 3000 - 10
U150 = 2990