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# Maths Ocr 2016 C1 Watch

1. When doing differentiation, applying to real life aspects, for example finding the maximum volume, why do we set dV/dx = 0
2. Can anyone help me with transforming graphs? like how can you tell if its a transformation parallel to the y axis or if its parallel to x axis?
3. (Original post by SGHD26716)
When doing differentiation, applying to real life aspects, for example finding the maximum volume, why do we set dV/dx = 0
Think of stationary points
4. (Original post by Logic4Life)
Can anyone help me with transforming graphs? like how can you tell if its a transformation parallel to the y axis or if its parallel to x axis?
If the change is inside the bracket then x axis. If change is outside the bracket then y axis. The only exception is when there is a reflection (negative sign). If the (-) is outside the bracket then reflection in x axis but if (-) is inside the bracket then reflection in y axis.
5. (Original post by Logic4Life)
Can anyone help me with transforming graphs? like how can you tell if its a transformation parallel to the y axis or if its parallel to x axis?
Below is a link to a picture which should help. it maybe a good idea to put it in a table for what affects the x axis and what affects the y axis.
https://l.wordpress.com/latex.php?la...&fg=000000&s=3
6. (Original post by CLGC98)
Think of stationary points
So volume is the same?
7. Do you always set dy/dx to 0 when finding max or minimum in real life situations?
8. How did everyone find the C1 exam? Question 11 & 9 were pretty hard....
9. How did people find it?! I thought it went VERY well!!
10. I liked it! But I wonder, what did you guys write down for what did you guys say for why the gradient of AB only is for point A?
11. What was the answer for k in the last question? I foudn it as -3(1/8)>k.
12. Hardest C1 paper yet?
13. (Original post by Dmitry_Mednov)
What was the answer for k in the last question? I foudn it as -3(1/8)>k.
I got that k is less that -7.5
14. Harder than any of the practice papers so far. OCR got me with very hard Geography and now the Maths. Thanks OCR!
15. Never struggled so much on a maths paper,i can safely say i won't get an A now.
I got a, as 25/2 and k, as -1+- root 15.Which I think are both wrong.
16. That is the third C1 paper I've sat - definitely hardest yet!
17. (Original post by Skipper12345)
I got that k is less that -7.5
I think most people got that answer
18. It was defo the hardest c1 paper in the last 6 years mate reckon I got 60
19. Does anyone remember what the last question's equations were?
20. fml why could i not have been born 1 year later and sat the june 2015 paper that **** was piss easy compared to this im ****ed unless its like 60 for an A

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