Question

Find the sum of the first 24 terms of the AP whose nth term is given by an = 3 + 2/3n

Answer 1

Step-by-step explanation:

an = 3 + 2/3n

a(1) = 3 + 2/3 = 11/3

a(24) = 3 + 2/72 = 3+1/36 = 109/36

S(24) = 24/2 {a + A24}

= 12 { 11/3 + 109/36}

= 12 {132+109/36}

= 12 * 241/36

= 241/3