In MF15 and MF26, we are given the partial fractions decomposition for
- Non-repeated linear factors
- Repeated linear factors
- Non-repeated quadratic factor
It is useful to work with partial fractions especially when we do integration.
I have given 3 examples on how and when we use cover up rule (CUR). It acts like a shortcut to comparing coefficients. However, please note when CUR works and when we have to stick to our old good method of comparing coefficients.