OCR MEI AS MATHS NEW SPEC PURE AND MECHANICS H630/1 - 16th May 2018

Honestly for pure and mechanics I got question 1 right (the surds one) so that’s 2 marks or whatever it was, question 2 the binomial expansion I think I got right and I think that was 3 marks and the vectors one I got a is -4 and b is 12 and my friends got that too so I think that is right and that was like 3 marks question 4 the pulley I like attempted but it’s not right and I couldn’t even write expressions the other mechanics question about a boat or pond or whatever it was I had a go but yet again I didn’t get anywhere with it the integration area under a curve I didn’t get 9 but I did integrate correctly so I hope I get some method marks and the differentiation question I differentiated and got -4 and then did y=1/4x + 1 and that’s all I did for that and question ten the Rory one I got t is 2.5 but I couldn’t do the rest of the question and question 11 I missed out because I’m pretty sure that question was just rubbish. So I only got about 15-20 marks so I’m going to fail when I have got a’s and b’s all year

I think I might be able to help you do well in the next paper, i'll pm you

I think I might be able to help you do well in the next paper, i'll pm you

I think I might be able to help you do well in the next paper, i'll pm you

I think I might be able to help you do well in the next paper, i'll pm you

I think I might be able to help you do well in the next paper, i'll pm you

I think it was better then pure and mechanics. However there was so many 1 marker explanation questions which i probably got wrong. Who got A is 500 and K was 1.044 for last question. Who got A>8 for the root question. Who got (0.5,12) for the stationary point and it was minimum. Who got the proof question i did (2x+1) and (2x+3) and got 8 out of the brackets. The last question on the first page what is the probability x1=x2 was hard. That circle queston was tricky but i got in the end you had to find equation of the Line L and the equation of the circle( the radius was 2 squareroot 2) and then find the discriminant. The discriminant when you did b squared minus 4 ac gave zero therefore it was a tangent. The Probablity Steps question was tricky i did day 8 minus day 1. Then added up day 2 up to Day 8 and divided it by 6 and got some high number something like that. I think the test in difficulty was like 70 percent easy 30 percent hard. The hard question were most likely the one marker explanations. First question I got 4 and -1

I couldn’t do the first logs one I got a is 1/4 for the first log one but couldn’t do it so don’t think that’s right. And then the circle one was really difficult even though it was just circles and I couldn’t do it. I got a > 8 so the same as you and I did the exact same proof. I got the same stationary point and I got it was a minimum too. For hypothesis testing I got there is sufficient evidence so reject H0 in favour of h1. Couldn’t do the last question to do with A and K and N and loved the question on mean and standard deviation to do with steps and that did you do mean + (standard deviation x 2) and mean - (standard deviation x 2) to see if the number of steps was unusually high and then got it was an outlier so it was unusually high.

I think it was better then pure and mechanics. However there was so many 1 marker explanation questions which i probably got wrong. Who got A is 500 and K was 1.044 for last question. Who got A>8 for the root question. Who got (0.5,12) for the stationary point and it was minimum. Who got the proof question i did (2x+1) and (2x+3) and got 8 out of the brackets. The last question on the first page what is the probability x1=x2 was hard. That circle queston was tricky but i got in the end you had to find equation of the Line L and the equation of the circle( the radius was 2 squareroot 2) and then find the discriminant. The discriminant when you did b squared minus 4 ac gave zero therefore it was a tangent. The Probablity Steps question was tricky i did day 8 minus day 1. Then added up day 2 up to Day 8 and divided it by 6 and got some high number something like that. I think the test in difficulty was like 70 percent easy 30 percent hard. The hard question were most likely the one marker explanations. First question I got 4 and -1

Yeah I got root 20 also. For the last question I put A = 500, k = 1.004, then worked out N as 750ish for part two so I said it wasn't consistent. Then for part 3 I said the model =500 when t = 0 and a couple other things and then part 5 I put that it doesn't include fluctuations above 750

was that seriously it for the last question! how did you know A was 500 if N was 500? that's what threw me off

N was the final number of the flies after t number of days so a is your starting number