Mr M's OCR (not OCR MEI) Core 1 answers Jan 2013

Hi, does anyone know what the final question actually was? Can't remember what I put for my actual answer so want to do the question again to see if I got the same answer. Thanks

For 3ii would reflection parallel to the x axis get any marks?

Hi, does anyone know what the final question actually was? Can't remember what I put for my actual answer so want to do the question again to see if I got the same answer. Thanks

I have it, if I upload it here do you think you can put up answers?

Got everything right apart from the last question. I got both of the x values right, but unfortunately I subbed the x values into the wrong equation so I got (3,27) and (-3, -21) which I know is wrong. Will I lose one or two marks for this out of interest?

Hey Mr M, I know you'll answer this evening, but I'll ask now since I'll be revising for my other exams. For the last question, I found the x=3 but I put that in to the y=8x - something equation so I did not get the same y-values like you, how many marks do you think I dropped? 2 or 3?

Mr M do u have the actually paper? could you upload it please

For 3ii would reflection parallel to the x axis get any marks?

10. Find the coordinates of the points on the curve $y=\frac{1}{3}x^2+\frac{9}{x}$ at which the tangent is parallel to the line y= 8x + 3.

10. Find the coordinates of the points on the curve $y=\frac{1}{3}x^2+\frac{9}{x}$ at which the tangent is parallel to the line y= 8x + 3.

Yes it is sorry. Will correct the typo.

I think it was 1/3x^3 + 9/x