Question

if an= n2 - 1 and an = 35 then 'n' is​

Answer 1

Answer:

Tn=4n2−1,Tn=35

To find:

 Value of n=?

Solution:

Tn=4n2−1

or, 35=4n2−1

or, 4n2=35+1

or, 4n2=36

or, n2=9

or, n=3

∴ value of n=3