Recent content by Logistics

anyone able to confirm if it's correct?

Hey guys I have just started learning mathematica and I was wandering if someone could confirm if I did the following correct: Question: Find the tangent plane to the surface z = 2x^2 -y^2 at the point (2,1). Plot the tangent plane and the surface on the same graph. Change th eviewpoint...

Solved the question, thanks for the replies

Thanks for the replies guys. I have left it as R = infinity; seems the rest of the class got the same thing. So I'll just leave it at that

Could someone please verify my working out, let me know if my answer is correct & if I have written the question out properly http://img280.echo.cx/img280/9528/solution9lx.gif Thanks

learningphysics, I think you're right about the graph to find the possible values. I'll see what I can do, damn taugh question for me

Well we got this in maths. And we have studied DE's. I also study physics. So pick your method / formulas. If I solved what v is how would that help me ?

This is my 3rd practice question that I don't know how to do :( Hoping peole can help me out, if someone could even work it out, would be greatly appriciated. A skydiver, weighing 70kg, jumps from an aeroplane at an altitude of 700 metres and falls for T1 seconds before pulling the rip...

We have studied the things you just mentioned. linear, 2nd order, homogenous, inhomogenous, auxillary equations etc. It's just we never did anything like that, we were always dive, simpler questions. The lecturer just isn't on the same level as we are :( Edit: If someone did the...

I'm not following :(((

So I get this ? z = a - x = a*sinw(L-y) / sinwL dz/dy = -w*acosw(L-y) / sinwL d^2z/dy^2 = -w^2*asinw(L-y) / sinwL = -w^2 * 2 If this is what you were referring to, what happens now ?

Hey guys this is my question ---------------------------------------------------------------------- A long thin rod is clamped vertically at its lower end and a mass M is attached to its upper end. The coordinates (x, y) of any point on it satisfy the equation EI\frac{d^2x}{dy^2} =...

Thank you very much. I have worked it all out :) 3 questions left that I don't understand will post them later :p

Edit: Added a 2nd link

I have a major exam coming up and we've been given few past exam papers to go through to practice. I have absolutely no idea what to do here :frown:, if people could help me out, work it out etc. It would be greatly appriciated. Link 1: http://img72.echo.cx/img72/3763/question0ex.jpg...