tentukanlah suku ke 10 dari barisan bilangan 1/2,2/5,3/10

1/2 = 5/10
2/5 = 4/10
3/10 = 3/10

Un = an + b

4/10 = 2a + b
5/10 = a + b —
-------------------
-1/10 = a

5/10 = -1/10 + b
b = 5/10 + 1/10
b = 6/10

Rumus : Un = -1/10n + 6/10

U10 = -1/10.10 + 6/10
U10 = -1 + 6/10
U10 = -10/10 + 6/10
U10 = -4/10



Maaf bila ada kesalahan