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Mathematics: Post your doubts here!
This is how I like to present it.. -
Mathematics: Post your doubts here!
You're right, just apply the formula to the question at hand, sorry I wasn't clearer -
Mathematics: Post your doubts here!
Yes the OP forgot the w in the first few steps but it has no effect on the final answer, because w here is just like x in a quadratic eqn such as: ax^2 + bx+c = 0 x = -b +- sqrt ( (b)^2 - 4 (a) (c) ) / 2a So it doesn't have any effect, thanks for pointing it out!! -
Mathematics: Post your doubts here!
Thanks :D It's the first rule of trig, cos^2 + sin^2 = 1 , so cos^2 = 1- sin^2 Hope this helps! -
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Mathematics: Post your doubts here!
I'm so sorry, my brain isn't working right now, but I checked my copybook, and for some reason I equated dy/dx to x So I got : +x^3 - 2x^2 - x = 0 Hence x = 1 Why though I equated it to x, I have no clue :O If you figure it out let me know!! -
Mathematics: Post your doubts here!
Perfect sense! can't believe I was such an idiot D: Thank you!! -
Mathematics: Post your doubts here!
Tried ten to the best of my abilities!! I hope you can do part two now that one is cleared up :D -
Mathematics: Post your doubts here!
Thank you so much!! This was very helpful!! just a little question though, in part (iii) How did you get the length sqrt(8) + 2 ? I know it's a silly question but thanks a heap :$ God bless you! -
Mathematics: Post your doubts here!
You're awesomee!! There you go :D hope it's clear! -
Mathematics: Post your doubts here!
Just a second, it's a long one :D -
Mathematics: Post your doubts here!
The rule he used here is this one : S is integral S f ' (x)/ f(x) dx = ln |f(x)| + c So he realized that if you diff y^2 + 4 you get 2y , but that's not the case in the numerator, to make it the case though, we can simply multiply inside the integral by two AND divide outside the integral by... -
Mathematics: Post your doubts here!
Although you'd find better luck on the Statistics forum, I'll attempt to solve it tomorrow -
Mathematics: Post your doubts here!
Sorry to bother, but this is the last past paper I'm solving before the exam and I just can't get it right at all >.< Darn complex numbers! http://papers.xtremepapers.com/CIE/Cambridge%20International%20A%20and%20AS%20Level/Mathematics%20%289709%29/9709_s12_qp_33.pdf It's question ten, usually i... -
Mathematics: Post your doubts here!
Is it something like this? Then i tend to infinity and obtain P = 100/e THANK YOU SO MUCH!! Remembered in my prayers! -
Mathematics: Post your doubts here!
Hello guys, I'm solving http://papers.xtremepapers.com/CIE/Cambridge International A and AS Level/Mathematics (9709)/9709_s12_qp_33.pdf and I had this beautifully posted solutions to all the paper, i', just wondering in Question 5 (ii) How did they get that formula? Why did they divide by 70 and... -
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Mathematics: Post your doubts here!
Not really, I just show it as a step to acknowledge the flipping of the limits.. since the upper limit was smaller than the lower, that is why they asked us to flip them and as a general rule you multiple by negative one, doesn't matter where really :D -
Mathematics: Post your doubts here!
Sorry if it's unclear, I just relaized!! I multiplied by negative one outside the integral, and the numerator is supposed to be -10 u which would give us +10 u and the answer they are looking for , sorry again! -
Mathematics: Post your doubts here!
THANK YOUUUU!!! OMG This is wonderful! Inshallah will help me tomorrow :D God bless you!