Recent content by Dollydaggerxo

I am just having trouble with percentages. Lets say a town has a population of 1,000,000 in 2006 1,200,000 in 2007 1,800,000 in 2008 The percentage increase from 2006-2007 is 20% 2007-2008 is 50% So, what I want to work out is the AVERAGE percentage per year. The increase...

Okay I have got it. Thanks!

Homework Statement Hello. I need help with orthogonality of the Fourier series coefficients. I know you can use the dirac delta function, (or the kronecker function) in the orthogonality relationship. I want to try and see the derivation using complex form rather than sines and cosines...

cant you do the absolute value of it as surely same power would be needed to go from 1 to 2 as 2 to 1

for any values of C?? all i am getting is what looks like a square graph translated a lot I am not sure what its mean to look like thanks

i see -- ok sorry. so \frac{y^2}{2} = \frac{x^4-2x^2}{4} + C ?? i still don't really know what to do with it though forgive me! thanks again

thanks for the reply! do you mean just straight forward integrate it w,r,t, x for example it would be \frac{x^4 - 2x^2}{4y} ?? then what would i do with that though?? thanks so much for your help

Homework Statement i need to create the phase diagram for the equation \ddot{x}=x^{3}-x using MATLAB Homework Equations Well i have worked out that there is a centre point at 0,0 and a saddle point at -1,0. The Attempt at a Solution i found a site on the internet which shows me...

Haha ok just ignore me, i think i get it now anyway. many thanks for your help its much appreciated!

brilliant thank you. how do i show that these elements that i have generated are the actual elements though? or is it enough just to say they are? and the fact that I haven't got the same result twice from 0 to 7 means that it is primitive? thanks so much

Homework Statement Hi, I need to show that \alpha+1=[x] is a primitive element of GF(9)= \mathbb{Z}_3[x]/<x^{2}+x+2> I have already worked out that the function in the < > is irreducible but I do not know where to go from this. Homework Equations there are 8 elements in the...

thanks so muchhh i think i know what I am doing now! can't believe never knew that way of writing skew-symmetric matrices

also how can i write a skew-symmetric matrix as a linear combination of I J and K? please help thanks

Homework Statement Hello, I have been asked to prove that three different matrices which are skew-symmetric with a defined operation can be shown to be isomorphic to the usual vectors in 3d space with the operation of the cross product. Homework Equations Well the operation i guess is...

thanks again. when multiplying matrices to say get M17 what order would i do the matrices in? For example does M17 = M x (M16) or M17 = (M16) x M