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question about double integration

Semidevil

Diamond Member
ok, so I am following the example in my book, but I dont know how it came up w/ the answer.

the question is that I have a parabaloid, z = x^2 + y^2, bounded by y = 2x and y = x^2

so one set of limit of integration is going to be between x^2 and 2x.
The book said that the other limit is going to be between 0 and 2.

how do I know it is between 0 and 2. I know that it is 0 since both lines intersect 0, but why is the upper limit 2?
 
I have to admit that at first glance I thought integration was 'penetration', and I was thinking wow, I'm surprised this isn't locked yet....


 
Originally posted by: NeoV
I have to admit that at first glance I thought integration was 'penetration', and I was thinking wow, I'm surprised this isn't locked yet....

lock it yourself!
 
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