Question

Narrate the first term is 2 the last term is 29 and the sum of the terms is 155 and the common difference of ap

Answer 1

a =2

an=29

Sn= 155

n/2[a+an] = 155

n[2+29] = 310

31n = 310

n = 10

an = a+(n-1)d

a10 = a+(10-1)d = 29

2+9d = 29

9d = 27

d = 3

Answer 2

Refers to attachment ☆~