soal UN matematika tahun ajaran 2015/2016 , by : UH

3,9,18,30
6,9,12
3,3

a = 3/2
b = 6 - 3(a)
b = 6 - 3(3/2) = 3/2
c = a - b
c = 3/2 - 3/2 = 0

an² + bn + c
3/2n² + 3/2n + 0

u7 = 3/2(7²) + 3/2(7) + 0
u7 = 3/2 × 49 + 3/2 × 7
u7 = 147/2 + 21/2
u7 = 168/2 = 84

Jawabannya Adalah C 84 Batang Korek

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