Question

Which term of the AP 21, 42, 63, 84……… is 210?​

Answer 1

let

a = 21

d = a2-a1 = 42-21 = 21

an = 210

n = ?

$10 \: is \: the \: answer$

Answer 2

Answer:

Solution : Let nth term of the given AP be 210. Hence, the 10th term of an AP is 210