Recent content by e_brock123

Homework Statement Hi I'm doing a question were I have 3 points and its asking me to find the normal to that plane, then it further asks to see if another point lies on that plane. So due to reading the question I feel that it is suggesting that if I found the normal and then doted it with...

Oh wow thanks heaps for the help I understand it much better now Mark44.

Homework Statement Hi I just have a problem in regards to setting up your partial fractions when doing nonhomogeneous differential equations using Laplace transforms. I’m at the stage of getting the inverse Laplace of: (1-625S^4)/(S^3 (25S^2+1) ) Homework Equations The Attempt...

Homework Statement Ok so before I begin I've done my share of research and have had no luck as people seem to be moving to calculators for answers these days. I know my rectangular and polar conversions in AC but I haven’t done too much work with complex numbers. I basically have two...

Actually don't worry I spoke to soon, I missed a simple rule of expanding the brackets. Thanks heaps for your help.

Ok I've cleared most of it up now but I have to ask one thing, how does - arcsin(x)*(1-x^2) - x^2*arcsin(x) = -arcsinx? I just don't understand the process of what's happening there.

Homework Statement I'm trying to solve the derivative of this equation: 1-(x*arcsin(x))/√(1-x^2 ) I've straight away disregarded the 1 as it will be 0 so I'm left with -(x*arcsin(x))/√(1-x^2 ). The Attempt at a Solution I've applied the quotient rule and labelled U= -x*arcsin(x) and...

Oh yea now I got you, thanks so much for your help.

could I please ask why 2xy times 1/(2*sqrt(y)=x*sqrt(y)? I see the 2's cancel but what about the rest?

Wait disregard my last attempt I made a mistake. I now have [2y-2xln(y)]/[2x^2+(xy/√y)] and I need the last bit to look like (x√y).

I see so your chose 2xy to cancel everything, so when it comes to this situation you are allowed to choose any term that will simplify the equation? Of course as long as your multiply top and bottom. I'm still stuck now I'm up to dy/dx = [(2y-2xyln(y)]/(2x^2+2xy√y) its so close to the answer...

Homework Statement I'm try to implicitly differentiate the function: xlny+√y=lnx The Attempt at a Solution And I got to the stage where I have: dy/dx = (1/x-lny)/(x/y+1/(2*√y)) which is where I have no idea on how to clean this up. Could someone please explain to me how to simplify a...

Hi I’m doing a project where we have to design a truss. I’ve made a design and I’ve figured out the reaction forces. There is a support in the middle and one on the left side, both of them are only vertical reactions and finally there is a load of 250N on the right being applied. I don’t...