Skip to content

Cambridge IGCSE Additional Mathematics

12.5Sum to infinity

Sum to infinity in Cambridge IGCSE Additional Mathematics: what the syllabus expects you to know, the learning objectives and how to practise.
Subtopic22 practice questions1 lesson

Learning objectives

What the syllabus expects you to be able to do.

  1. 12.5Use the condition for a geometric progression to converge and the formula for its sum to infinity.

Lessons

  • Convergent geometric progressions and the sum to infinity

    35 min

    Full access

Join to read every lesson, or see what Full access includes.

Sample question

A sample question on this topic. Answer it, check it, then read the worked answer.

Sum to infinity: sample question

1 mark

Find the sum to infinity of the geometric series 36+12+4+⋯36 + 12 + 4 + \cdots

Only if the answer has a unit, e.g. cm or km/h.

Turn Sum to infinity into a strength.

Practise with instant marking, see your mastery grow and get a study plan built around your exam date.