The Student Room Group

FP1 matrices help

I'm stuck in these questions 12a and b, can someone please prove it to me.

ImageUploadedByStudent Room1420910728.351759.jpg

Thanks in advance for the help


Posted from TSR Mobile
What's your working so far?
Reply 2
Original post by Hudl
I'm stuck in these questions 12a and b, can someone please prove it to me.

ImageUploadedByStudent Room1420910728.351759.jpg

Thanks in advance for the help


Posted from TSR Mobile


I will help you with (a)/ the other is similar

well write matrix λA (entry form)

work out determinant in terms of its entries (expanded form)

factorize λ2 out

Rewrite the resulting expression back as a determinant (matrix form)

Quick Reply

Latest