In evaluating a double integral over a region
D
, a sum of iterated integrals was obtained as follows:
?_(D)f(x,y)dA=\int_0^1 \int_0^(2y) f(x,y)dxdy \int_1^3 \int_0^(3-y) f(x,y)dxdy
Sketch the region
D
and express the double integral as an iterated integral with reversed order of integration. Can you explain the question ? Especially how i can draw