Recent content by bombz

Homework Statement Here are my problems.[PLAIN]http://img256.imageshack.us/img256/2254/whatua.jpg Homework Equations possible conversions to polar coordinates but I doubt that's needed. Fubini's theorem?The Attempt at a Solution So for the h(x,y) integral does not exist, I got this: i...

ahh that makes sense :) thank you so much!

Why is the Cartesian integral wrong? I take 1/4 slice of the circle, calculate area of the big circle and then calculate the area of the small circle and subtract them out to receive the area of the annulus.

Yes, quinzio, that was my cartesian integral. Except there's a 4 in front of the first integral. You wrote it correctly the way I have it in my work. It did ask me to calculate the area of the annulus though. so can't I do what I did?And tiny-tim, thank you :) You put me on track with the polar...

Dear tiny-tim, how would I use those values then? So basically, This isn't a form we are using in class but from the piecewise, I am getting? f(x,y) = 0 when x+1<y or when y <= x-1 How would I use that to find the domain though?? how would I even sketch it?? Sigh. Any more hints would be...

Dear tiny tim :) What would be the lower bound for r then?? Would I just multiply the whole integral by 2 and make the bounds go from 0 to 2 and the other 0 to 1?

Homework Statement 2. On the domain x \geq 0; y \geq 0, dene the function f(x; y) such that [PLAIN]http://img100.imageshack.us/img100/2144/huhh.jpg Homework Equations I'm not so sure. The Attempt at a Solution I apologize for no attempt. I am just totally confused with this notation as I...

Homework Statement Okay here's the problem: Consider the region R interior to a circle(of r =2) and exterior to a circle(r=1). 1.Using cartesian coords and double integral, calc the area of annulus. 2. repeat calculation above but using double integral with polar coords The...

Oh my gosh. Thank you so much! exactly what I was looking for. I worked through it so well with your help. THUMBS UP!

Homework Statement http://img85.imageshack.us/gal.php?g=hw1y.jpg Its an imageshack gallery Homework Equations Book gives completely irrelevant equations. The Attempt at a Solution I couldn't even solve A. I have no clue how to start this. The instructor isn't providing any...