mohon bantuan nya kakak

Barisan dan Deret

Barisan Aritmatika

a = -12
b = U2 - U1
b = -7 - (-12)
b = -7 + 12
b = 5

U34 = -12 + (34 - 1) 5
U34 = -12 + 165
U34 = 153  (C)

Semoga Membantu!!!