Question

I don’t know how to do this.

Answer 1

`a_(n) = (n)/((n +1)^(2))`

Explanation:

`a_(n) = (n)/((n +1)^(2))`

`a_(1) = (1)/((1 +1)^(2)) = (1)/(2^(2)) = (1)/(4)\\\\a_(2) = (2)/((1 +2)^(2)) = (2)/(3^(2)) = (2)/(9)\\\\a_(3) = (3)/((1 +3)^(2)) = (3)/(4^(2)) = (3)/(16)\\`