Recent content by Rizzamabob

Im going crazy, i just want to write equations in microsoft word, but none include the damn Error symbol which looks like a rounded E :/ I want to use like E with a small i next to it but i cannot. Any ideas :( I am going nuts :<

What exactly does this mean, i have a set of data and it asks me to write a model for it, and to define all non-arithmetic peices in my model. The data shows no real symmetry or anything. What type of "model" should i be writing ? :confused: Here is the data.

Ok, i didn't realize i could write matrix's like that and deal with them just as variables... OK so this is what i did... CCC + CC + C + I = 0 (re arrange) C = - (CCC + CC + I) (I = C^(1) C) C = - (CCC + CC + (C^(-1)C)) (GET C^(-1)C on other...

"Show that if a square matrix C satisfies C^3 + C^2 + C + I = 0 then the inverse C^-1 exists and C^-1 = -(C^2 + C + I)

Ok, so say when i derive cosh(x + y^2) with respect to x, i get (1+y^2)sinh(x+y^2) correct ?? basically i don't touch y^2 and treat it as a whole number ?? :shy: But i don't get it, since if i had like cosh(x+3), then the derivative would just be sinh(x+3) using the chain rule correct ?? so why...

Hey, I am a bit confused oh how to use the chain rule when i have 2 variables in an equation... Example : f(x,y) = (Squareroot(x)).(cosh(x+y^2)) x(s,t)=st y(s,t)=s/t When i have 2 variables, I am not sure how to split it up and use the chain rule, all the examples i found only have 1...

Thanks, atm I am working this way y = (x^2 (e^x + e^-x))/2 + (\log_e(x)(e^x + e^-x))/2 ===> y = ((e^x + e^-x) (x^2 + \log_e(x)))/2 Then try to find dy/dx i have a feeling it will be YUCK

\log_e(x) Thanks:bugeye:

Left my book at uni, that's why i need help now :(

Hey, Need help in the steps to take to find the derivative of y=cosh(x^2 + loge(x)) and e^y +ytanh(x) = x I have never seen them before, therefor not sure which rule to use, I am thinking the second needs partial derivatives :bugeye: Thanks!

Thank you so much, that helped me :cool: Appreciate the help dude

"Determine whether each of the following functions is a linear transformation. If you think the function is a linear transformation then prove that it is. If you think the function is not a linear transformation then explain why. (a) T : R2 ! R2; T(x, y) = (x − 2y, 2xy)." I don't want an...

Thanks everyone, i completed the assignment :cool: I should be posting a few more little questions here :approve: Thanks :-p

AHH i just remember that I = 1 correct ?? If so that makes sense. Wait maybe I am thinking of the determinant of I to be equal to 1 :rolleyes: :smile: Infact, is it because when you end up multiyplying out with the identity, since both upper and lower regions are = to 0, you multiply...

Yer, i was doing the second method, but I am not sure what i do to the idenity matrix, and what rules and how when i multiply by a integer how it effects the identity etc. Like i know i need to make matrix A = to the identity, and do whatver i do to the matrix a, i have to do to the identity...