[Official Thread] OCR MEI AS Mathematics 2016 (C1, C2 & S1)

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3x^-1/2 ii) -12x^-1 +c

when a=5 sum from u2 to u4 is 25
when a=6 sum from u2 to u4 is 0

r=2 d=3.5 difference is 768-33=735

Angle is 66.5~

y=sin(2x)

graph is translated (0, -3)

logs simplify to -3m

log question x=2.14

area of B is 1/2r^2(theta)-1/2a^2sin(theta)
a is 6root2cm~

trap rule A=22.8 V=1140

sub 4.8 into x, y is> 4.4 therefore wont fit

area according to model is 24 V=1200
sub 5+h and 5 into f(x) simplify to get 8+h
as h-->0 m=8
tangent is y=8x-25
area with axes is 39.0625
simplify logs to get straight line form with gradient b and y intercept log a
a~4.17 b~0.19

therefore y=4.17*10^0.19t

last question sub 4 into w viruses: 260.

(edited 7 years ago)

Reply 681

Grindle97

What was the question to which people got the answers 25 and 0? What did it ask you to do?

Reply 682

mavrick388

So disappointed- i know how to do all the questions that were on that paper except for 1 marker but when doing the paper, i made too many mistakes, just had no concentration. Even with the question asking for the equation of the sine curve on the graph i wrote y=sinx- missed the transformation completely...guess i'm retaking c2 next year.

Reply 683

WuMyster

Also. My integrated area was massive. 144cm^2. I redid the integration 100 times but I don't see my mistake.

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Reply 684

Crozzer24

Original post by ScalyJake

I also got this. Because the cubed was for the entire log, so you didn't bring it down to the front.

Yeah if you plugged in values for a and m into the calculator it worked out right

Reply 685

Lucuniexet

Was the equation for the sin graph y=sin(2x) ????????

Reply 686

Qwertykeyboard15

Can we all agree there will be low grade boundaries as it was so hard this paper

Reply 687

Mr Moon Man

Original post by Lucuniexet

Was the equation for the sin graph y=sin(2x) ????????

Yeah

Reply 688

GCSEsThen

Original post by tom476zf

yes got this :smile:

not sure is its right though ?

Got same (-3m) pretty sure its right

Reply 689

WuMyster

Original post by Mr Moon Man

Yeah

Oh **** I wrote theta. Fml so many stupid mistakes

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Reply 690

mavrick388

Original post by Qwertykeyboard15

Can we all agree there will be low grade boundaries as it was so hard this paper

Personally, i didn't find it hard at all. I still ****ed up that paper- though this wasn't due to difficulty, but to...i don't even know

Reply 691

justnaomihere

Original post by Crozzer24

The log graph was awful, felt impossible to draw a best line of fit, ended up with y intercept of 0.6 and gradient 0.2 which seems way off

I got exactly the same

I put -m^3

I got y intercept of 0.58

Reply 694

justnaomihere

Original post by Lucuniexet

for the simplifying log question i got -3m
is this familiar to anyone?!

*****t i just left it as -1^3m. do you think ill get marks for that

Reply 695

Dowel

Original post by WuMyster

Also. My integrated area was massive. 144cm^2. I redid the integration 100 times but I don't see my mistake.

I got 144 as well but the answer was 24 apparently which makes a lot more sense as they should be similar but I don't know what I did wrong

I presume you were meant to x the fraction by the x values first and then integrate it.
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