Question 0403a

Arithmetic and Geometric Progressions (APs, GPs)

Sums and Terms

Question

The sum of the first

{n}

terms of a series is given by

S_n = 4 n^2 + 3 n.

Find an expression, in terms of

{n,}

for the

{n\textrm{th}}

term of the series,

{u_n.}

{u_n =}