This was a problem on a final test I took this april in Reykjavík University and I whould be greatful if you could help me with it.
Homework Statement
Let f(x,y)=2x*cos(y^4) be a function and let D be area in R^2 defined by 0≤x≤1 and x^(2/3)≤y≤1.
Calculate the double integer:
∫∫f(x,y)dA...