Question

Kak jawab dong dgn penyelesaian

Answer 1

~Jawab~

Diketahui :

3, 8, 15, 24, 35

Menggunakan rumus pola bertingkat.

a = 3 | 3, 8, 15, 24, 35
b = 5 |...5..7.....9....11...
c = 2 |.....2...2....2......

Un = a + ( n - 1 ) b + ( n - 1 ) ( n - 2 ) / 2 . c

U12 = 3 + ( 12 - 1 ) 5 + ( 12 - 1 ) ( 12 - 2 ) / 2 . 2

U12 = 3 + 11(5) + (11)(10)/2 . 2

U12 = 3 + 55 + 55 . 2

U12 = 3 + 55 + 110

U12 = 168 buah [ Opsi D ]