Question

Sebutkan rumus Sn dan Un!

Answer 1

Verified answer

Un=a×(n-1)b
Sn=n/2(Un+a)

Answer 2

● Barisan aritmetika:
Un = a + (n - 1)b

● Deret aritmetika:
Sn = n/2 × {2a + (n - 1)b)}

● Barisan geometri:
Un = a × r^(n - 1)

● Deret geometri:
Sn = a × (r^n - 1)/(r - 1)