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# Higher Maths Question Watch

1. I can't understand how I got this wrong, I got A as the answer but the marking scheme say it's C, any one know what you were meant to do to get that answer, I think they have differentiated to get C but you were meant to intergrate, here is the question.

Also what is the answer to this one I got A

Hopefully the marking scheme is wrong and them I will have got 100% on multi choice
2. (Original post by Jack--)
I can't understand how I got this wrong, I got A as the answer but the marking scheme say it's C, any one know what you were meant to do to get that answer, I think they have differentiated to get C but you were meant to intergrate, here is the question.

Also what is the answer to this one I got A

Hopefully the marking scheme is wrong and them I will have got 100% on multi choice
eh for the first one I got A as well, to get C you differentiated. Are you sure that is the right answer?

For the second one, I don't think it's A. To work out the centre, you do 2g = x value and 2f = y value then work it from there. If that is how you do it!
3. (Original post by Jack--)
x

For the first one, I get A, and since CSM gets it too, I'd assume the marking scheme is wrong.
For the second one, a circle has the equation: and the centre of the circle is
(-f,-g) so the centre of this circle is (1, -3) or A.
4. (Original post by TheFOMaster)

For the first one, I get A, and since CSM gets it too, I'd assume the marking scheme is wrong.
For the second one, a circle has the equation: and the centre of the circle is
(-f,-g) so the centre of this circle is (1, -3) or A.
wth I'm so confused about the second one then. I got (3,-9) which is B. Surely if you take 2g = -6, g=-3 so the x value would be 3 I'm probably doing something wrong (even though it is not my question)
5. (Original post by CSM1996)
wth I'm so confused about the second one then. I got (3,-9) which is B. Surely if you take 2g = -6, g=-3 so the x value would be 3 I'm probably doing something wrong (even though it is not my question)
Look at the coefficients of x^2 and y^2 in both the equation and general equation of a circle
6. (Original post by TheFOMaster)
Look at the coefficients of x^2 and y^2 in both the equation and general equation of a circle
omg haha i read it as x^2 and y^2 not even looking at the 3 woops
7. (Original post by CSM1996)
omg haha i read it as x^2 and y^2 not even looking at the 3 woops
Don't worry, I made the same mistake until glancing back at the question
8. 12 is A

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Updated: April 14, 2013
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