diketahui a =2,6,10,14,18 b =3,8,13,18 c =4,7,10 tentukan u8,u9,u10 dari barisan di atas? Terima kasih:)

#A

2,6,10,14, 18, .. Un

Dik. a = 2 & b = 4
Dit. U8, U9, & U10 ?

U8 = a + 7b
U8 = 2 + 7 (4)
U8 = 2 + 28
U8 = 30

U9 = a + 8b
U9 = 2 + 8(4)
U9 = 2 + 32
U9 = 34

U10 = a + 9b
U10 = 2 + 9(4)
U10 = 2 + 36
U10 = 38


#B

3, 8, 13, 18, ... Un
Dik. a = 3 & b = 5
Dit. U8, U9, & U10 ?

U8 = a + 7b
U8 = 3 + 7(5)
U8 = 3 + 35
U8 = 38

U9 = a + 8b
U9 = 3 + 8(5)
U9 = 3 + 40
U9 = 43

U10 = a + 9b
U10 = 3 + 9(5)
U10 = 3 + 45
U10 = 48

#C

4, 7, 10.. Un

Dik. a = 4 & b = 3
Dit. U8, U9, U10 ?

Jawab...

U8 = a + 7b
U8 = 4 + 7(3)
U8 = 4 + 21
U8 = 25

U9 = a + 8b
U9 = 4 + 8(3)
U9 = 4 + 24
U9 = 28

U10 = a + 9b
U10 = 4 + 9(3)
U10 = 4 + 27
U10 = 31


Semoga membantu.. ^_^