# MAT - Paper 2018 - Q1B

> Source: https://ollybritton.com/notes/maths/problems/mat/2018/q1b/ · Updated: 2021-10-27 · Tags: mat, notes, maths

## Flashcards
### 2021-10-27
##### $$k(k+1)(k-1) = k$$ Why can't you divide through by $k$ here??
$k$ might be zero.

##### $$k(k+1)(k-1) = k$$ How can you divide through by $k$ here??
Note down that $k = 0$ is a solution.

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