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# 数学微积分代写 MATH 237代写 数学考试代考 微积分代考

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## Final Exam – MATH 237

### Question 2 数学微积分代写

(i) Cartesian coordinates

(ii) Cylindrical coordinates

(iii) Spherical coordinates

(b) Evaluate one of the three integrals from part (a).

### Question 3

Determine the points on the elliptical disk described by x2 + 3y2 3 where the function

f(x, y) = x2 + 6y2 2y3

attains its global maximum and minimum values. You must use the method of Lagrange multipliers in your solution.

### Question 4数学微积分代写

The function T(r, s) = 1 + s2 + 2r r4 describes the tastiness of a cookie as a function of its raisin content, r, and its sugar content, s. At coordinates (x, y), the raisin content of a cookie is given by r(x, y) = x xy, and the sugar content is given by s(x, y) = 1 + y x2.

An ant munches on the cookie at the point (x, y) = (0, 0).

(a) Using the multivariate chain rule, determine the direction in which the ant should move to experience the most rapid increase in tastiness. At what rate does the tastiness increase as the ant moves in this direction?

(b) Determine all directions in which the ant can move to increase the cookie’s tastiness at a rate of 2.

(c) A spider chases the ant away from the origin, forcing the ant to move in the direction of (1, 1). At what rate does the tastiness change as the ant moves in this direction?

### Question 5数学微积分代写

The region R bounded by the curves y = 2 x, y = 4 x, x2 y2 = 1, and y2 x2 = 1 represents a thin flat copper plate in the xy-plane.

Assume that the density of the plate at (x, y) is given by the function

ρ(x,y)=(x + y)(x2 y2 + 1) kg/m2.

(a) Determine a mapping (u, v) = F(x, y) that will transform the region

R into a rectangle in the uv-plane.

(b) Use your mapping from (a) and the change of variables theorem to set up and evaluate a double integral that calculates the total mass of the plate.

The next:

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