AQA A-Level Further Maths C9-01 Determinants: Rules for the Manipulation of Determinants

[vjamie]

You’ve written aqa in the title, does that mean that this is not needed for the ocr Mei spec?

[jordanw]

Hi Jack - I'm a bit unsure on where you're using matrices and determinants here? Is the first example for #4 a matrix or a determinant, as you used straight brackets? If it's a matrix we could pull out 1/2 as a factor from all elements right? Without 1/2 being cubed?

Whereas I'm assuming for part #2 that it's a matrix - but straight brackets are used so it looks like a determinant? Or am I missing something?

My textbook implies some of the rules are for matrices, rather than the determinant so I'm really struggling to get my head around it.

Thankyou

[Pellioose]

In the example where you had a 3x3 matrix and so it was 2^3 - if it was a 3x4 matrix, would it be 2^3 or 2^4? I guess I'm asking is the value of the power decided by the number of rows or columns?