Mathematics A-Level
half-life
What half-life means in Mathematics A-Level, as defined for WJEC.
Definition of half-life
Check what you remember
Read the wording for your board, then hide it and explain half-life in your own words. Rough notes are fine. This is a self-check, with no mark or grade.
Reference: WJEC
Found by setting y = 0.5y₀, giving t_(1/2) = (ln 2)/λ.
Topics that use half-life
- Exponentials and logarithms (AS Unit 1: Pure Mathematics A) (WJEC A-Level)
Related terms
- ambient temperature baseline
- carrying capacity
- combining logarithms
- domain restrictions
- exponential growth
- exponential models
- fractional coefficients
- gradient and intercept
Using half-life in the exam
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