3.4.4 Sequences and Series (A-level only)

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An arithmetic series has first term $a\,$ and common difference $d$ .

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

\frac{1}{2}n(2a + (n-1)d)

[4]

57%

An arithmetic series has first term $a\,$ and common difference $d$ .

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

\frac{1}{2}n(2a + (n-1)d)

[4]

3.4.4 Sequences and Series (A-level only) Questions