Question

Tolong di bantu para senior

Answer 1

Jawabannya B
caranya = Sn =n/a (2a + (n-1)b)
72 =n/2 (2(2)+(n-1)2)
72 =n/2(4+2n-2)
72 =n/2 (2 + 2n)
72 = n+n∧2
72 =n(n+1) =8=n8
bilangan asli pertama genap 2,4,6,8,...


#maafkaloslah