Consider the following equation. f(x, y) = y3/x, P(1, 2), u = 1 3 2i + 5 j (a) Find the gradient of f. ∇f(x, y) = Correct: Your
answer is correct. (b) Evaluate the gradient at the point P. ∇f(1, 2) = Correct: Your answer is correct. (c) Find the rate of change of f at P in the direction of the vector u. Duf(1, 2) = Incorrect: Your answer is incorrect.
The correct answer is C, 2+3P is equal to or greater than 20 because you have to add 2 to whatever amount of points he got the other three rounds, and to make it to finals you need at least 20