Question

Find the sum of first 22 terms of ap in which d=7 and 22 term is 140

Answer 1

Answer:

1617

Step-by-step explanation:

For the AP,

d=7

l=140

Tn=n/2[a+l}

T22=22/2[7+140]

T22=11[147]

T22=1617

Hence,the sum of first 22 terms of the AP is 1617.