why sometime we need to reverse the order of integration?(adsbygoogle = window.adsbygoogle || []).push({});

and how to determine the new limit?

for example: for integration of dydx, the limit of y and x:

y=2x , y=2;

0<=x<=1.

after we reverse the order become dxdy, how to determine the new limit of x and y?

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# Reverse the order of integration

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