Official Edexcel C3 Discussion Thread

I thought it was pretty standard? :/ The only 'odd' question was the differentiating x=tany one, all the others questions were no easier or harder than previous years (in my opinion)

me and half my class did that!
i think it was a propper badly worded q! x

I thought this exam was solid tbh, but i thought this was the last oppertunity to take this exam how come people ar eon about retakes?

8 - yes you will need the other two (one of the reasons it is very hard)
9 - you are told x>1 so fg>3 not >=

That question was pretty good imo.

Just find dx/dy then find the inverse (i.e. dy/dx)

I considered using implicit differentiation but I don't think I'd have got marks for using techniques not officially covered until later in the year.

For question 4. (i)

y= ln(x^2+1)/x i used the quotient rule then found hard to simplify so i crossed it out, i then changed y to ln(x^2+1)x^-1 and differentiated.

i used vu' + uv'. Is this wrong and if so do they mark crossed out solutions?


Also if i got two values for (a,b) in 7(c) and one value and method is right just i used a value out of range do i still get all the marks or less because i put down a wrong soluion as well. Thanks for any replies.

i reckon by the sounds of everyone on this thread the grade boundaries are gonna be high, unless its just the majority of people on this thread are a minority of clever people taking the A level

made stupid mistakes. like the x=tany question. i was puttin in back into part 1. lol. evn the 1st question was kinda hard.