Hiya, just wondering if you had seen the mechanics 2 paper today and whether there was a similar unofficial mark scheme for that?

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Reply 91

mcfc@2012

For 7i) I put:

((3x)^2 x x^4) / x = 9x x x^3 (dividing both values by x like a plonker). I went on to get dy/dx = 36x^3. How many marks would I lose for this. Thanks.

Reply 92

Thelightbulb96

I got y+2x-12=0
Will they take a mark.off cos it said in the form
ax+by+c=0

:frown:

Reply 93

thehman

Original post by mcfc@2012

For 7i) I put:

((3x)^2 x x^4) / x = 9x x x^3 (dividing both values by x like a plonker). I went on to get dy/dx = 36x^3. How many marks would I lose for this. Thanks.

What was the Question?

Reply 94

tinkerbell_xxx

Original post by xT4Z1N4TRx

Was I the only one that found it REALLY hard?! :facepalm:

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I found the last question really hard, that finding K one was a bit hard but I managed to get an answer down.

One of my friends came out of the exam like 'OMG that was the best maths exam ever' and i was just like no. :confused:

Reply 95

mcfc@2012

Original post by thehman

What was the Question?

Find dy/dx for:

[(3x)^2 x x^4] / x

It was 3 marks.

(edited 11 years ago)

Reply 96

thehman

Yeah I made the exact same mistake, Hopefully well get a mark or 2! What about iii, you know the question??

Reply 97

Mr M

Study Forum Helper

Original post by nigerianTank

For question 10, how many marks would u get for the correct coordinates and differentiating, but not with the hidden quadratic parts?

How did you do it otherwise?

Reply 98

Rudytazz

Hi mr M for part 7iii i didnt get the constant infront of the x right but i did get the power right would i get a mark for that

Reply 99

Mr M

Study Forum Helper

Original post by thebigman1

Does anybody know what 9(iii) was and how they got to their answer? Think i messed that one up...
Also how many marks would i get on question 10 for getting the right x-value but subbing it into the wrong equation and therefore getting the wrong y-value

9(iii) Find the equation of the tangent to the circle at the point (7, -2) giving your answer in the form ax + by + c = 0 where a, b and c are integers.

10) Drop 1 or 2 marks.