Mathematics A-Level
validity of solutions
What validity of solutions means in Mathematics A-Level, as defined for WJEC.
Definition of validity of solutions
Check what you remember
Read the wording for your board, then hide it and explain validity of solutions in your own words. Rough notes are fine. This is a self-check, with no mark or grade.
Reference: WJEC
Checking mathematical roots against contextual constraints and rejecting unphysical values, such as a negative time value that is physically inadmissible.
Topics that use validity of solutions
- Overarching themes - Mathematical problem solving (WJEC A-Level)
Related terms
- accuracy and rounding
- algebraic modelling
- change of sign
- Concave up
- contextual interpretation
- Convergence
- curve sketching
- error analysis
Using validity of solutions in the exam
Check the command word and mark scheme for your exact question. After comparing your explanation with the reference, use the term in an answer on the linked topic. This practice does not predict an exam mark.
Practise Mathematics questions
Create a free account to answer exam-style questions on this topic and get feedback on your answers.
Start free
All Mathematics A-Level termsA week of Premium from your first lesson · Then the free plan continues · No card, no charge