Flashcards
2021-10-22
What is it sometimes constructive to do with a system of equations where at least one of the entries is always zero??
Add up all the equations rather than just a pair.
When equating coefficients, what must you check??
That you’re actually equating it to something they’ve told you must exist.
If you’ve been given that $$\frac{1}{1 + \alpha} = A + B\alpha + C\alpha^2$$ why can’t you just do $$1 \equiv (1 + \alpha)(A + B\alpha + C\alpha^2)$$ and compare coefficients??
Because you’d end up with a cubic expression on one side, and they haven’t told you that exists.
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date: 2021-10-22 16:45
summary: what is special about this equation with only one real solution?
tags:
- '@?public'
- '@?mat'
- '@?notes'
- '@?maths'
title: MAT - Paper 2017 - Q2