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|2x - 1| < / = |x -3| This is another novincial thing I've forgotten how to do. i took the case where both sides are positive which gives me x >/= -2 then i took the case where both sides are negative which gives me the same answer but what about when one side is negative and the other side...

Anyone got any tricks for drawing inverse functions? I'm sure there was one i learnt but i' ve forgotten. Any tips or tricks are appreciated.

oh my bad, misread your post(nice use of OP :P) fine let a = v^2 +3 or something and just follow those steps

1. if A(x1,y1) B(x2,y2) are divided in the interval m:n then multiply the A with n and B with m you pretty much switch it around 2. Lets say we are given the equation a = v^2 + 3 and we want to find an equation for velocity There are 2 ways to do this that i know of: i) a = dv/dt so...

Thanks, i get it now

ah you have to draw your own line, of course! thanks for the help

Hey guys, having trouble with this question: In the expansion (1+x+kx^2)^9 in ascending powers of x, the coefficient of x^2 is zero find the value of k. there are so many coeff of x^2 im sure there is another way then expanding everything out. Thanks in advance

Since the paper is so conveniently posted here ... can anyone explain to me q7 b) part (i) ? please forgive me if it is a stupid question but i just cant see it :(

okay here's my attempt: differentiating 4ay = x^2 gives us y'= x/2a therefore gradient at x = x1 is x1/2a now to work out the gradient of SQ since we know S is (0,a) we must find out Q Eq'n of the tangent at P is: 2a(y-y1)=x1(x-x1) for the point Q y must = 0 since it intersect the...

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i get 1/5 my working: possible outcomes with B: RB WB BB BR BW each has a 1/6 probability of occuring therefore the probability of selecting BB is 1/5 if one must be B

Arthur please stop posting on my account t_T

how have you accounted for the ascending order part of the question? Also since this is a card question order doesn't matter so why have you divided by 40P5

That's not very nice, I'd advice to get a straw so you can suck it up

yeh i asked bakes about this question the question is unclear what it means is having the cards in a straight e.g. 12345,23456 etc. therefore solution is 4C1x4C1x4C1x4C1x4C1 x no. of straights you can make just write it out it, doesnt take too long then divide this by 40C5

Torrent it? and use the windows 7 loader that's floating around if you cbf to sign up

Agreed The font makes it worse, the letters are so thin which makes it annoying to read I reckon if they made it a thicker font and popped in a couple of pictures here and there it would be better

this means 3 out of the 3! permutations are the same since you can rotate the circle

Consider a straight line of men alternating with women MFMFMF if this were made into a circle it would the perscribed arrangement so men can be arranged 3! ways and women can be arranged 3! since it is a circle we do not need therefore total arrangement is = to 3! x 3! = 36 not sure if this...