Turn on thread page Beta
    Offline

    0
    ReputationRep:
    can any1 get hold of the paper?? n then we can post sum answers....
    Offline

    1
    ReputationRep:
    um guys?
    It kinda said that K>1.

    So I found 0.5 my self in the beginning and tried to work out a number greater than 1.
    I guess then 1.5 is the answer
    Offline

    0
    ReputationRep:
    gayyyyy

    For the temperature last bit your supposed to say:
    As t tends to infinity "t --> [infinity]", e^-0.05t tends to 0 ("e^-0.05t --> 0), therefore, T --> 400(0) + 25 = 25.

    T will never reach 20
    Offline

    0
    ReputationRep:
    i got 1/2k too
    Offline

    0
    ReputationRep:
    (Original post by Rabite)
    I think that's right.

    They were talking about the third? Second? part though, where you have to find fg(0.25k) or something.
    fg(x)= ln ( [2x+k] + k)
    fg(k/4)= ln (3k/2)
    That's what i got at least, hope it helps
    Offline

    13
    ReputationRep:
    definitely harder than the other two..... i got the iteration wrong, kept putting it into y= and wondering why it was wrong, of course i've now realised it was dy/dx...

    there was a lot of stuff in there that wasn't immediately obvious and required some amount of thought...

    did others get -3root7/8 at one point and 135 degrees as the only answer at another?
    Offline

    0
    ReputationRep:
    k u know 4 question 5, when we had to find out x1 x2..etc, did we have to put it in radians, i think ma cal was in deg. do u rekon i'd get any marks?
    • Thread Starter
    Offline

    2
    ReputationRep:
    PS. argh ****. "instead of turning point" i wrote "root". penis weed.
    oh poooo, I did the same!
    I thought the paper was harder than the last 2, and different from all the solomon papers - there seemed to be a lot of emphasis on graph sketching. So annoying with the sin2A, I was sitting there thinking that I could have done that 2 years ago, but the whole obtuse angle thing stumped me.. I managed a couple of lines of working though and got something bizzarre like -root (63/64) as the answer - but just got that thru putting it all in the claculator....wonder if theyll give me any marks, cos it is right!.... shame I havent learnt C4 yet !!

    xxx
    Offline

    13
    ReputationRep:
    i found this paper MUCH harder than the two past ones. C4 has to be good
    was the rate question -1.64

    i left it as -1.64 and didnt write it decreases at a rate of 1.64 per minute

    will i lose a mark? i believe i may have lost a comfortable 15 marks on the paper.
    Offline

    0
    ReputationRep:
    (Original post by sebbie)
    definitely harder than the other two..... i got the iteration wrong, kept putting it into y= and wondering why it was wrong, of course i've now realised it was dy/dx...

    there was a lot of stuff in there that wasn't immediately obvious and required some amount of thought...

    did others get -3root7/8 at one point and 135 degrees as the only answer at another?
    I agree with the 135 degree angle question, however I got (+3root7)/8, as sin was also positive in the domain given with the cos value. Therefore [email protected]@ is also positive
    Offline

    0
    ReputationRep:
    (Original post by 3.14159265)
    i found this paper MUCH harder than the two past ones. C4 has to be good
    was the rate question -1.64

    i left it as -1.64 and didnt write it decreases at a rate of 1.64 per minute

    will i lose a mark? i believe i may have lost a comfortable 15 marks on the paper.
    So long as you indicated the temperature decreased at this rate, the question asked you to give the answer in terms of degrees C/min, so unless you did that and put -1.64 degrees C/min I'm guessing you'd lose probably just one mark for incorrect sign
    Offline

    1
    ReputationRep:
    reakon i lost a good 25 marks :mad: :mad: , really wasnt a great paper. First 4 questions were ok, then managed to do bits of the rest, just fell to piecestowards the end :confused:
    Offline

    1
    ReputationRep:
    Let's just hope the boundaries are lowering lol.
    That's our only hope. Well my only hope
    Offline

    13
    ReputationRep:
    (Original post by Warren_Sullivan)
    I agree with the 135 degree angle question, however I got (+3root7)/8, as sin was also positive in the domain given with the cos value. Therefore [email protected]@ is also positive
    A was between 270 and 360

    therefore 2A between 540 and 720

    sin is negative in that range....
    Offline

    0
    ReputationRep:
    (Original post by Warren_Sullivan)
    I agree with the 135 degree angle question, however I got (+3root7)/8, as sin was also positive in the domain given with the cos value. Therefore [email protected]@ is also positive
    however sin was not positive becuase it was the 4th quadrant.
    Offline

    1
    ReputationRep:
    (Original post by franks)
    oh poooo, I did the same!
    Yeah I did that too, argh. But hopefully it won't matter since it's f'(x) - the gradient that's changing sign - so it would be a root since the gradient is 0 at the turning point...well hopefully anyway.
    Offline

    1
    ReputationRep:
    for the 1.64 aswer, i wrote
    (-) cm gap then 1.64

    will they still knock of a mark for it?
    Offline

    1
    ReputationRep:
    (Original post by r3m0t)
    Duh, if T >= 25, then T >= 20. THey probably did it because they thought that in other papers, people looked at the answer and worked backwards.
    I interpreted the question wrong. It said why cant T reach 20, I was like "hmm thats obv you cant evaluate ln(negative)" but then I thought WHY didnt they say why cant T<25. I thought it was trying to catch me out. Luckily I just put T=20, you got ln(negative) showed you cant evaluate ln(negative) and just left it at that.
    Offline

    0
    ReputationRep:
    cos @= 3/4
    therefore, by drawing a right angled triangle...
    sin @= (root7)/4 (also positive)
    [email protected]= [email protected]@= 2.(root7).1/4.3.1/4= (3root7)/8
    ?
    Offline

    1
    ReputationRep:
    That was a joke, it was soooooo hard. My trig isnt up ot scratch and the only part of that I know is when u have the R involved. That didnt come up! GRRRR. I will be happy with a D lol. ( ps was hoping for C or B)
 
 
 

University open days

  • University of Lincoln
    Mini Open Day at the Brayford Campus Undergraduate
    Wed, 19 Dec '18
  • University of East Anglia
    UEA Mini Open Day Undergraduate
    Fri, 4 Jan '19
  • Bournemouth University
    Undergraduate Mini Open Day Undergraduate
    Wed, 9 Jan '19
Poll
Were you ever put in isolation at school?
Help with your A-levels

All the essentials

The adventure begins mug

Student life: what to expect

What it's really like going to uni

Rosette

Essay expert

Learn to write like a pro with our ultimate essay guide.

Uni match

Uni match

Our tool will help you find the perfect course for you

Study planner

Create a study plan

Get your head around what you need to do and when with the study planner tool.

Study planner

Resources by subject

Everything from mind maps to class notes.

Hands typing

Degrees without fees

Discover more about degree-level apprenticeships.

A student doing homework

Study tips from A* students

Students who got top grades in their A-levels share their secrets

Study help links and info

Can you help? Study help unanswered threadsRules and posting guidelines

Groups associated with this forum:

View associated groups

The Student Room, Get Revising and Marked by Teachers are trading names of The Student Room Group Ltd.

Register Number: 04666380 (England and Wales), VAT No. 806 8067 22 Registered Office: International House, Queens Road, Brighton, BN1 3XE

Write a reply...
Reply
Hide
Reputation gems: You get these gems as you gain rep from other members for making good contributions and giving helpful advice.