Recent content by hytuoc

anyone know the answer to my question above?

A=[1,1,1;-1,3,1;2,3,-2;1,3,2] A is 4X4 b=[4;0;1;2] ; b is 4X1 I calculated x^ (residual of x) to be [1.4127; -.0159; .8889] r(x^) = b-A*x^ = [1.7143; 0.5714; 0; -1.1429] Nul(A')=[-1.5;-.5;0;1] so how accurate is MATLAB in calculating least square solution?

Does anyone know how accurate is MATLAB in calculating least square solution? Thanks!

How do I do this problem below? Plz guide me step by step or a least show me the correct bounds so I can learn...thanks ***Find the area bounded by y^2=x and y=x=2 Thanks so much

1) Integral of bound C of function x*e^y ds; C is the line segment from (-1,2) to (1,1). How do i get the bound and the x and y in parameter form? Show me please! I need to learn! 2)A wire w/ constante density has the sahpe of the helix x=a*cos(t), y=a*sin(t), z=bt, 0<=t<=3 pi. Find its...

someone please help me out w/ this ASAP...thanks much

Got it to ask for inputing the value for a...now I have another probelm...the approximate length isn't working right when i compare my sol'n w/ the samplecalc. I am attaching my updated code along w/ this message I have to write a program that compute the arc length : "A segment of the curve...

inputing a, I did the same thing to ask for input for theta1 and theta2...how come it work fine for those put not for "a"??

Thanks much

I am working on a project, I am attaching my code and the Solutions...im not sure wat is wrong w/ the code, but i couldn't get it to ask for "Inputting a value for a" at all...i was able to get it to input theta1 and theta2 though. Plz help me out ASAP...I want to attach my assignment pages...

How do I get the bounds for a function w/out drawing a graph?? Like, Volume of the solid bounded above by the sphere r^2+z^2=5 and below by the paraboloid r^2=4z. How would I get the bounds for these in cylindrical coordinate (r dz dr dtheta)? ***Mass of the solid inside the sphere p=b and...

how to integrate sin(x^2)?

How do I interchange the integration bound for the function below (change to dx dy): Integral from 1/2 to 1, integral from x^3 to x [f(x,y)] dy dx ?

Plz help me integrating the integral below...I did it to a certain point and got stuck...here is the integral and what I did: 1) Integral form 0 to pi/2, integral from 0 to a*sin(2*theta), [ r ]dr dtheta Inner integral: Int from 0 to a*sin(2theta) [(r^2)/2] dr = [a^2 * (sin(2 theta))^2 ] / 2...

someone please show me how to integrate this integral from 0 to x of e^(-t^2) Thanks