Last updated on Sep 22, 2026

Sigma Notation (AQA A-Level Mathematics): Flashcards

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Sigma Notation

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Sigma notation definition

Compact way to express the sum of a series of terms

$\Sigma$ symbol meaning

Sum

Bounds in sigma notation (name)

Limits

Index of summation in $\sum_{k=m}^{n} a_k$

$k$

General term in $\sum_{k=m}^{n} a_k$

$a_k$

$\sum c \cdot a_k$ equals (c constant)

$c \cdot \sum a_k$

$\sum (a_k + b_k)$ equals

$\sum a_k + \sum b_k$

$\sum_{k=1}^{5} k$

$15$

$\sum_{k=1}^{4} k^2$

$30$

$\sum_{k=1}^{6} (2k+1)$

$48$

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Explore AQA A-Level Mathematics Exam Questions by Topics

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