AS/A2 Pure 2 Pure 3

P1 Topic 5: Sequences and series
Understanding summation notation
You must understand clearly how summation notation works, particularly use of the sigma symbol, the limits and the types of expressions used. Move the mouse over each expression below and look at the status bar at the bottom for a description.

which is also written as

Some examples Click to reveal the sequence.

In general

Note that there may be more than one way of putting a sequence into summation notation

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