For the question where it asked you to find the roots i couldn't remember if that meant to write them as x = -1 or (x+1) so i wrote it in both forms, will i be penalised for this?

Reply 145

aaaargggi

Original post by mockjam

I got that but also did an stupid working out error and got k< -60/8 and k>-60/8 will is till get most of the marks for correct workings

Yeah definitely at least 4/5 imo

Reply 146

erinls2

For question 4 was it work out A in terms of C or C in terms of a because I think I did C in terms of a and got -7a/(3-2a)

Reply 147

juicebox55

Can anyone remember how many marks the last 2 questions were worth?

Reply 148

sflg1

Original post by Nik12

was quite a good paper. I got the last question wrong for some reason i put k < 3/2 not sure why... Though most of the equations ended up using the formula for finding out x and y which was annoying, but it worked out fine.for section B the radius was 5 right? and the 7 marker on finding the roots did you guys get x = 1 and some weird surd?

For the tangent question all you had to do was find both gradients and when you multiply them it equals -1 which shows they are both perpendicular hence being at a right angle.

I got the same for k...

Reply 149

Tyler213

Original post by juicebox55

Can anyone remember how many marks the last 2 questions were worth?

Second last was out of 4, last was out of 5

Reply 150

bethygirl

Original post by erinls2

For question 4 was it work out A in terms of C or C in terms of a because I think I did C in terms of a and got -7a/(3-2a)

The question was A in terms of C unfortunately x

Reply 151

neymar69

What does everyone think the A boundary is?

Posted from TSR Mobile

Reply 152

Quido

Original post by neymar69

What does everyone think the A boundary is?

Posted from TSR Mobile

Probably 60

Reply 153

Nik12

Original post by victoria_cw

i got 3/2 as well... how did people get 15/2??

Posted from TSR Mobile

i figured what we did wrong...

we got 36+24+8k < 0

but we did 8k< 12 (because we dont know how to add and take to the other side) when it should have been 8k<-60 ...

ugh im so friggin pissed with myself.

(edited 7 years ago)

Reply 154

bethygirl

Hi guys. For the question which you had to firstly estimate the roots of the graph and then show that the two equations made all one equation which was a cubic and then find the exact roots. You did get 3 different roots right? I've seen on the post above that someone got x = 1 and then a weird surd however I got X = - 1 then did the polynomial division thing then got the other 2 roots as a surd using quadratic formula. Was is positive or negative 1 because looking at the image of the graph it definitely showed as X = -1 as it was all on the left hand side of the Y axis ? Thanks for any help anyone can give I am STRESSING

Reply 155

Realforce

https://docs.google.com/document/d/1GrOwL3hZzhJmn8rd9IyozRJX6e6-0fAlwbaEnJkJEnw/edit#

Unofficial mark scheme linked above.

Can you all please help with question 10 and 11. The question along with the answer is all that is needed. Thank you.