Double Integrals: Evaluate I for Domain D

[splelvis]

to evaluate the integral:

I=dxdy/(x^2+y^2)^(1/2)


over domain D:
given by 1<=x^2+y^2<=4.

what should i take the limits to integral?
dx and dy

 

[tiny-tim]

Welcome to PF!

Hi splelvis! Welcome to PF!

(have a square-root: √ and try using the X² tag just above the Reply box )

… over domain D:
given by 1<=x^2+y^2<=4.

what should i take the limits to integral?
dx and dy

One of the limits will be -2 to 2 … let's say for y.

Then just look at the graph …

for a fixed value of y, what does x go from and to? ​

 

[splelvis]

thank you i got that

 

[Sweet_GirL]

Hello,
I think polar coordinates is a good choice for this one. :)