Question

Ap the sum first is 3n squ/2 + 13n/2 find the 25th term.

Answer 1

............. .. ... . .. . . . . . . ..

Answer 2

Answer: 25th term is 80

Step-by-step explanation: if n=1 , First term =8

If n=2 AP= 19 so second term =19-8=11

If n=3 AP=33 So third term =33-19=14

So series is 8,11,14,.... Difference of 3

so nth term equation= 5+3n

so 25th term= 5+75 = 80