Q1 of 50 Page 32

Find the sum of the first 25 terms of each of the arithmetic sequences below.
19, 28, 37, …

a = 19

d = 28-19 = 9

S_n =

Here, n = 25

∴ S₂₅ =

= 3175

Find the sum of the first 25 terms of each of the arithmetic sequences below.

12, 23, 34, ….

Find the sum of the first 25 terms of each of the arithmetic sequences below.

21, 32, 43, …

Find the sum of the first 25 terms of each of the arithmetic sequences below.

1, 6, 11, …

What is the difference between the sum of the first 20 terms and the next 20 terms of the arithmetic sequence 6, 10, 14, …?

Questions · 50

1. Arithmetic Sequences

1 2 3 4 5 1 2 3 1 2 3 4 5 1 2 3 4 5 6 7 1 2 3 4 5 6 7 8 9 10 11 12 1 1 1 1 1 2 3 4 5 6 6 6 6 6 7 8 9 10

Find the sum of the first 25 terms of each of the arithmetic sequences below.19, 28, 37, …