Mathematics A-Level
modulus of common ratio
What modulus of common ratio means in Mathematics A-Level, as defined for WJEC.
Definition of modulus of common ratio
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Reference: WJEC
Written |r|, it must be less than 1 for an infinite geometric series to converge to a finite limit.
Topics that use modulus of common ratio
- Sequences and Series (A2 Unit 3: Pure Mathematics B) (WJEC A-Level)
Related terms
- Arithmetic sequence
- binomial approximation
- common difference
- compound growth and depreciation
- Convergent geometric series
- Geometric sequence
- infinite binomial series
- linearity of summation
Using modulus of common ratio in the exam
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