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Consider the circular region x2 + y2 = 81, What is the maximum value of the function?

Posted: Thu Jul 14, 2022 9:29 am
by answerhappygod
f(x, y) = x6 + y2(3x4 + 1) + x2.(3y4 + 1) + y6
a) 90
b) 80
c) 81 + 813
d) 100