1.6.13 Standard formulae for arithmetic series (A-level only)

An arithmetic series is defined by its first term $p\,$ and its common difference $q$ .

Prove that the sum of the first $n\,$ terms of this series is

\frac{1}{2}n[2p + (n-1)q]

[4]

An arithmetic series is defined by its first term $p\,$ and its common difference $q$ .

Prove that the sum of the first $n\,$ terms of this series is

\frac{1}{2}n[2p + (n-1)q]

[4]

1.6.13 Standard formulae for arithmetic series (A-level only) Questions