Answer on Calculus Question for Marcel
that x2 + y2 = 9 and please show calculations
2x = 2λ x;
-2 = 2λ y;
x2 + y2 = 9.
Hence: λ = 1, y = -1, x2 = 8.
The function has one extreme value:
f(x,y) = 8 + 2 = 10.
f(√5, 2) = 5 - 2 = 3.
Thus f(x,y) = 10 is the maximum of the given function subject to constraint that x2 + y2 = 9.
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