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# Category: A-level

## Geometric series 1 (example-problem pairs)

## Geometric series 2 (example-problem pair)

## Sum to infinity 1 (example-problem pair)

## Sum to infinity 2 (example-problem pair)

## Sigma notation 1 (example-problem pairs)

## Sigma notation 2 (example-problem pairs)

## Graphing the modulus function (example-problem pair)

## Modulus equations (example-problem pair)

## Inequalities with the modulus function (example-problem pair)

## Domain of functions (example-problem pairs)