For the domain D in the drawing where the equation of the green line is y= pour x , one has
| xrange , yrange , linewidth=2 plot green, segment ,,,, blue segment ,,,, blue segment ,,,, blue fill ,, skyblue text black,,0,giant, text black,,0,giant, linewidth 1 vline 0,, black hline ,0, black hline , , black text black,,,giant, y= parallel ,,,, 0,1, 20, grey parallel ,,,, 1,0, 20, grey arrow 0,, 0,,10,black arrow ,0, ,0 ,10,black |

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What are the missing bounds ?

xrange , yrange , linewidth=2 fpoly skyblue,,,,,,, poly blue,,,,,,, text black,,giant,A text black,,giant,B text black,,giant,C text black,,giant,D text black,,giant,E text black,,giant,F linewidth 1 vline 0,0, black hline 0,0, black parallel ,,,, 0,1, 20, grey parallel ,,,, 1,0, 20, grey arrow 0,, 0,,10,black arrow ,0, ,0 ,10,black

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What are the missing bounds ?xrange , yrange , linewidth=2 fpoly skyblue,,,,,,, poly blue,,,,,,, text black,,giant,A text black,,giant,B text black,,giant,C text black,,giant,D text black,,giant,E text black,,giant,F linewidth 1 hline 0,0, black hline 0,0 , black parallel ,,,, 0,1, 20, grey parallel ,,,, 1,0, 20, grey arrow 0,, 0,,10,black arrow ,0, ,0 ,10,black

Let A=(), B=(), C=(), D=(), E=(), F=() be points in the plane and
the domain bounded by the polygonal line
(see drawing). One can write the double integral _{ D} f(x,y) dx dy on the form 1 . or on the form 2 with reals. Which one do you choose (1 ou 2)? What are the bounds ? | xrange , yrange , linewidth=2 fpoly skyblue,,,,,,, poly blue,,,,,,, text black,,giant,A text black,,giant,B text black,,giant,C text black,,giant,D text black,,giant,E text black,,giant,F linewidth 1 hline 0,0, black hline 0,0 , black parallel ,,,, 0,1, 20, grey parallel ,,,, 1,0, 20, grey arrow 0,, 0,,10,black arrow ,0, ,0 ,10,black |

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