Question

(07.05)
Graph the first six terms of a sequence where a = -10 and d = 3.

Answer 1

Answer:

15

Step-by-step explanation:

Using the formular, Sn = n/2(2a + (n - 1)d)

where, n = 6: Sn = 6/2( -20 + 5(3)) = 3(15 - 20)

∴  Sn = 15