Question

Find the sum of 24 terms of theA.p. 5,8,11,14.....

Answer 1

a=5 , d=3 , S24= x Sn = n/2 (2a +(n-1)d) S24 = 24/2 (2*5 +(24 - 1) 3) x = 12 (10 + (23) 3) x = 12 (10 + 69) x = 12 (79) x = 12*79 x = 948 The sum of 24 terms is 948