Question

The sum of n terms of an ap is 3n2+5n find its 16 th term​

Answer 1

Step-by-step explanation:

given sum of n th terms is 3n^2+5n

let n is 1 then sum of 1 term is 3+5= 8

let n be 2 sum of 2 terms is 3(4)+5(2)=22

a1 is s1 is 8

a2 is s2-s1 is 22-8 is 14

d is a2-a1 is 6

then 16 th term is a+(16-1) d

8+15(6)

98

Answer 2

Answer:

8+15 6

Step-by-step explanation:

98 is the best answer