Evaluating a Function In Exercises 9-20, evaluate the function at the given values of the independent variables. Simplify the results. f ( x , y ) = 3 x 2 − 2 y (a) f ( x + Δ x , y ) − f ( x , y ) Δ x (b) f ( x , y + Δ y ) − f ( x , y ) Δ y
Evaluating a Function In Exercises 9-20, evaluate the function at the given values of the independent variables. Simplify the results. f ( x , y ) = 3 x 2 − 2 y (a) f ( x + Δ x , y ) − f ( x , y ) Δ x (b) f ( x , y + Δ y ) − f ( x , y ) Δ y
Solution Summary: The author explains how to determine the function at a given value of independent variables.
(9) (16 points) Let
F(x, y, z) = (x² + y − 4)i + 3xyj + (2x2 +z²)k
=
-
= (x²+y4,3xy, 2x2 + 2²).
(a) (4 points) Calculate the divergence and curl of F.
(b) (6 points) Find the flux of V x F across the surface S given by x² + y²+2² =
16, z ≥ 0.
(c) (6 points) Find the flux of F across the boundary of the unit cube E = [0,1] ×
[0,1] x [0,1].
(8) (12 points)
(a) (8 points) Let C be the circle x² + y² = 4. Let
F(x, y) = (2y + e²)i + (x + sin(y²))j.
Evaluate the line integral
JF.
F.ds.
Hint: First calculate V x F.
(b) (4 points) Let S be the surface r² + y² + z² = 4, z ≤0. Calculate the flux
integral
√(V × F)
F).dS.
Justify your answer.
Determine whether the Law of Sines or the Law of Cosines can be used to find another measure of the triangle.
a = 13, b = 15, C = 68°
Law of Sines
Law of Cosines
Then solve the triangle. (Round your answers to four decimal places.)
C = 15.7449
A = 49.9288
B = 62.0712
×
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Chapter 13 Solutions
Calculus: Early Transcendental Functions (MindTap Course List)
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