Edexcel FP3 June 2015 - Official Thread

YOU NEED TO SPEAK TO A PURIST ... Sorry I do Physically applied/methods
I remember back to my degree says, that if a matrix is symmetric then the eigenvectors have to be orthogonal, but I do remember the proof ...
My apologies.

in June 2008 question 1, for sechx=3/5 don't you get an answer of In(3) when you use the indentity? (using x as 5/3?)

When Edexcel sort out your modules to determine whether they go in maths or further maths, do they sort them to give you the best possible grade in both subjects, or do they put the best modules in maths? Also, do you have any say onhow you want the modules arranged ?

Posted from TSR Mobile

When Edexcel sort out your modules to determine whether they go in maths or further maths, do they sort them to give you the best possible grade in both subjects, or do they put the best modules in maths? Also, do you have any say onhow you want the modules arranged ?

Posted from TSR Mobile

Can you link the paper? Can't find it

I have downloaded few linear algebra textbooks and will be reading those during holidays to get better understanding.
I don't understand the thought in introducing all this matrix stuff in fp3 without first explaining linear algebra.

if the cross product of two vectors gives a vectors (axb) that is perpendicular to both a and b, is the the exception to this when a and b are parallel? if, lets say, you did want to find a vector perpendicular to a and b where a and b are parallel how would you go about this then?

in June 2009 question 1, for sechx=3/5 don't you get an answer of In(3) when you use the indentity? (using x as 5/3?)

What identity? I'm pretty sure you just have to rewrite in terms of e and solve the resulting quadratic

I think they try to get the best possible in maths.
But if you aren't happy with the way they arrange it, I think you can get it changed. (I was worried about this too and this is what my teacher told me)

Best grade in maths then best grade FM the max UMS in maths the max UMS in FM


Posted from TSR Mobile

in the alternative method (ii) https://3a14597dd5c7aa2363f0675717665774b02557b0.googledrive.com/host/0B1ZiqBksUHNYQWE5bVRTVE9BLW8/June%202009%20MS%20-%20FP3%20Edexcel.pdf

i got sechx=3/5 and i used arcoshx =In(x+sqrt(x^2 -1) and when i substitued 5/3 i get In 3 which is not the answer

Remember, arcosh(x) also equals ln(x-sqrt(x^2 -1)

Linear algebra is just matrices tbh.