Question

2
Example 15 : Find the sum of first 24 terms of the list of numbers whose nth term is
given by
a = 3 + 2n​

Answer 1

Answer:

672

Step-by-step explanation:

a = 3 + 2n

a = 3 + 2* 1 = 5

a = 3 + 2* 24 = 51

a= 5

sum = n/2 (a + l)

sum = 24 /2 ( 5+ 51)

12 * 56

= 672