Need help, please explain example 1 for me!
http://tutorial.math.lamar.edu/Classes/CalcIII/GreensTheorem.aspx
why is 0

Question

Need help, please explain example 1 for me!
http://tutorial.math.lamar.edu/Classes/CalcIII/GreensTheorem.aspx
why is 0<=y<=2x?

anonymous · Answer

$$0\le y \le 2x$$

anonymous · Answer

anyone? just want to know why the boundaries for y is [0,2x]

anonymous · Answer

i think that's just the arbitrary shape they decided on for that particular example.  there's nothing special about the value.

anonymous · Answer

yes, but my question is how did they get that boundary from the shape?

anonymous · Answer

that's just how they defined the shape

anonymous · Answer

i understand from the verticies they start with, and the graph they drew. I also understood how they got the boundaries for x, but i don't understand the y boundaries