Question

10. If sum of n terms of an AP is 2n2+5n, then find its nth term.​

Answer 1

Step-by-step explanation:

Sn = 2n^2 +5n

n/2 [a +tn] = 2n^2 +5n

an +n tn = 4n^2 +5n

$tn = \frac{4 {n}^{2} + 5n - an }{n} \\ \\ hope \: it \: helps \: uh.....$

Answer 2

Mark as brain list.