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Posted by Salman on Saturday, April 17, 2010 at 9:06pm.
Suppose that ∫∫_D f(x,y)dA=3 where D is the disk x^2+y^2<=16. Now suppose E is the disk x^2+y^2<=144 and g(x)=3f(x/3,y/3), what is the value of the integral of ∫∫_E g(x,y)dA?
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