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1. |
Consider the circular region x2 + y2 = 81, What is the maximum value of the function?f(x, y) = x6 + y2(3x4 + 1) + x2.(3y4 + 1) + y6 |
A. | 90 |
B. | 80 |
C. | 81 + 813 |
D. | 100 |
Answer» D. 100 | |