A-Level Maths: G5-10 Differentiation: A Tricky Parametric Differentiation Problem
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- Опубліковано 7 січ 2018
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great Teacher, low your videos. Keep going
Eeeeh I got this right before attempting it. Fantastic video, and I managed to find a much faster way!
yay, well done? what was the faster way if u dont mind sharing
managed to get the same answer but unfortunately i wasted time doing it the long way which involved finding where the tangent intersects with x axis. then i did inverse tan of (O/A) using the calculated width of the right angle triangle (Opposite to feta) which i calculated to be (5ln10 - 6.411) divided by the height (Adjacent to feta) which we know is 101/5 .
just adding this comment because it might resonate more with others. yes its long but if it fits ur shoe then why not lol
yeah definitely, still it's best to use the quickest, most efficient method in the exam.
How do you know that where u = 10, thats exactly where the point (A,C) is? Is the origin to A, the same as u going from 1 to 10?
As x=5ln(u), x is strictly increasing. So u=1 is at B, and u=10 is at C.
Hi just wanted to find out if you cover partial derivatives at all or is this not in the A level specification?
No it isn't covered at A-Level. I think there are options in Further Maths that include it.
why did you use degrees instead of radians? thought it was calculus so had to be in radians
The gradient of the tangent is 3.96, regardless, so the angle can still be given in degrees.
is this a past exam question? If it is how many marks was it? if it wasn't how many marks do you think it would be?
It is based on an old exam question - I just changed the numbers. Part a. was 5 marks and part b. was 6 marks.
why is it u=10 shouldnt it be u=5ln(10) ?
u=10 is correct as u is the parameter, x=5ln(10) not u