# Further Maths - Series Tips and Tricks

> Source: https://ollybritton.com/notes/a-level/further-maths/topics/series-tips-tricks/ · Updated: 2020-09-21 · Tags: further-maths, school, a-level

The sole purpose of this entry being seperate is so that I don't have to re-load the other [Further Maths - Series](https://ollybritton.com/notes/a-level/further-maths/topics/series/) into Anki because it's got some formatting issues that are down to underscores inside Latex formulas being recognised as italics rather than subscripts.

##### How can you rewrite $\sum^{n}_{r=1} (r+4)^3$??
$$
\sum^{n+4}_{r=1} r^3
+
\sum{4}_{r=1} r^3
$$

##### Why can you rewrite $\sum^{n}_{r=1} (r+4)^3$??
Because it's the same as a $r^3$ sequence starting at $5$.

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