For the iterative question did you have to put the answe to 4 decimal places or 3? I did everything to 4???? How many marks have I lost? I also therefore put the intersection point to 4dp?

Reply 225

notcloseatall

On question 8ii I put that f(x) couldn't have an inverse because of the modulus and that you can't inverse a modulus. I also wrote that the graph would be one to many and that it wouldn't be a function. Was the first part right and if it wasn't would I get the marks for the second part?

Reply 226

littlemissdebbie

Can we add a poll to this?? how hard did everyone find it and what grade boundaries do you reckon?

Reply 227

username1271026

how many marks would you lose for not getting A and B i did everything else right i even calculate the y value as 18 just didn't solve the simultaneous equations

Reply 228

FluffyCommie

Original post by rich1334

My solutions, in order:Y=12x+15
4x-4lnx-1/x+c
3/16(4x+1)^4/3 + c
128, 81.92
31 hours
1/13, 3/4
Show ln2
5/2
A=6, B=5
Graph
Root 0.242
Graph transformations
Ranges: all real, greater or equal to 4a, modulus has no inverse
Inverse: 1/5(x+4a)
X=1.5a, x=-2.5a
Show equiv to 2
4+2root2
0.659
32sin(x)
No guarantee these are right but I'm pretty confident

These are pretty much exactly the same results i got, except in question 9 i got the value of 0.66, not 0.659, i rounded to 2sf where i should have rounded to 3, probably won't get that mark.
I'm feeling confident about my answers, so it's reassuring to have someone else confident with the same answers :P

Reply 229

delia97

Can anyone remember what f(x) and g(x) were?

Reply 230

FluffyCommie

Original post by Yazmin123

how many marks would you lose for not getting A and B i did everything else right i even calculate the y value as 18 just didn't solve the simultaneous equations

You'll probably lose 1 mark for not solving the equations and 2 marks for each answer i'm guessing

Reply 231

NadeemKha_Arab

What was the 8 mark question 6? The one with a=6 b=5?

I want the exact question with equations if possible?

I don't know why but I remember getting b=5 and a= 3 or 2?

Reply 232

Davidych

Original post by HecTic_H

Grade boundaries anyone?
Going to guess:
41 - C
47 - B
53 - A
59 - A*
Really difficult paper imo.

Agree with you)
May be 1 mark higher for each grade)
Paper was not terrible but it was harder than the average paper)

Reply 233

Dom1997

Original post by Mrrexxxx

For the iterative question did you have to put the answe to 4 decimal places or 3? I did everything to 4???? How many marks have I lost? I also therefore put the intersection point to 4dp?

Only 1 I'd say if your value was the correct answer to 4 SF.

Reply 234

Agent47_

Original post by Dom1997

Only 1 I'd say if your value was the correct answer to 4 SF.

If I can remember correctly, the question asked the values of X_nto be to at least 4 sig figs. If you did it to 4dp that is fine. If you put your answer to 3 dp which = 4sf you will probably loose one mark.