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Question: plotting contours and labelling

Question:plotting contours and labelling

myphi 45 Maple
contourplot plotting
June 07 2019
2

I have the following two equations:

u=1-(8*(10.3968*t^2-5.8368*t*f-.229376*f^2-5.1984))/(4.56*t^2-2.56*t*f+.8192*f^2+2.28)^2;

x = f+t-(8*(-2.28*t+.64*f))/(2.28+2*(-t+.64*f)^2+2.56*t^2);

 

How can I plot the contours of u in the x-t plane (with its elevation value labelled in the line of each contour)?

 

Thank you a lot for your help!
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