Question

Find the sum of first 15 terms of the ap 2,5,8.....

Answer 1

Answer:

Sum of first 15 terms is 345

Step-by-step explanation:

First term a=2

common difference d=5-2=3

number of terms=15

Sum of first 15 terms can be given by

S=n(2a+(n-1)d)/2

s=15(2*2+14*3)/2

s=15(4+42)/2

s=15(46)/2

s=15*23

s=345

Sum of first 15 terms is 345

Answer 2

Step-by-step explanation:

follow the above steps