Question

Find the sum of first 5 terms
of the AP 3, 7, 11, ...... ?​

Answer 1

Answer:

hope you appreciate this ans

Answer 2

Answer:

55

Step-by-step explanation:

a= 3

d=4

n=5

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

Sn= 5/2(6+16)

Sn= 5/2(22)

Sn= 5*11

Sn= 55