Changing the order of a triple integration

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To change the order of integration from dzdydx to dydxdz for the given triple integral, it is essential to analyze the original limits of integration. The original limits indicate that z varies from 0 to 1-y, y ranges from sqrt(x) to 1, and x goes from 0 to 1. By sketching the integration region, one can visualize the bounds and determine the new limits for y. The correct limits for y in the new order will depend on the relationships between x and z, ultimately aiding in the accurate setup of the integral. Understanding the geometric representation of the integration region is crucial for successfully changing the order of integration.
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I'm given this definite integral:
\int_0^{1}\int_{\sqrt{x}}^{1}\int_{0}^{1-y}f(x,y,z)dzdydx

I need to change the order to dydxdz, but I'm stuck trying to get the limits of integration wrt y.

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\int_0^{1}\int_{x^2}^{0}\int_{}^{}f(x,y,z)dydzdx

How do I find the limits of y?
 
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Just look at the original iterated integral to see the region over integration occurs.

z = 0 to z = 1 - y
y = sqrt(x) to y = 1
x = 0 to x = 1.

Sketch that region and it will help you determine the limits of integration for a different order of integration.
 
Question: A clock's minute hand has length 4 and its hour hand has length 3. What is the distance between the tips at the moment when it is increasing most rapidly?(Putnam Exam Question) Answer: Making assumption that both the hands moves at constant angular velocities, the answer is ## \sqrt{7} .## But don't you think this assumption is somewhat doubtful and wrong?

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