Trigonometry (MindTap Course List)
10th Edition
ISBN:9781337278461
Author:Ron Larson
Publisher:Ron Larson
Chapter6: Topics In Analytic Geometry
Section6.6: Parametric Equations
Problem 5ECP: Write parametric equations for a cycloid traced by a point P on a circle of radius a as the circle...
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Question
![Let f(x, y) = 9 – x² + xy – 5y2.
(a) Find f.(1, 4) and f,(1, 4).
fx(1, 4)
f,(1, 4) =
(b) Interpret the numbers in part (a) as slopes.
f,(1, 4) is the slope of the tangent line to the curve of intersection of the surface z = 9 - x² + xy – 5y2 and the plane y
= 4 at the point (1, 4, –68). f,(1, 4) is the slope of the
tangent line to the curve of intersection of the surface z = 9 – x² + xy – 5y and the plane x = 1 at the point (1, 4, -68).
O f,(1, 4) is the slope of the tangent line to the curve of intersection of the surface z = 9 – x + xy – 5y and the plane y = 1 at the point (1, 4, –68). f (1, 4) is the slope of the
tangent line to the curve of intersection of the surface z =
9 - x2 + xy - 5y2 and the plane x = 1 at the point (1, 4, -68).
O f,(1, 4) is the slope of the tangent line to the curve of intersection of the surface z =
9 – x2 + xy – 5y2 and the plane y = 0 at the point (1, 4, –-68). f(1, 4) is the slope of the
tangent line to the curve of intersection of the surface z =
9 – x2 + xy - 5y2 and the plane x = 1 at the point (1, 4, -68).
O f,(1, 4) is the slope of the tangent line to the curve of intersection of the surface z =
9
x2 + xy – 5y2 and the plane y = 4 at the point (1, 4, 0). f(1, 4) is the slope of the
tangent line to the curve of intersection of the surface z =
9 – x2 + xy - 5y2 and the plane x = 1 at the point (1, 4, 0).
(c) Interpret the numbers in part (a) as rates of change.
O f,(1, 4) is the rate of change of f(x, y) with respect to x with y held fixed with a value of 4. f,(1, 4) is the rate of change of f(x, y) with respect to y with x held fixed with a value
of 0.
O f,(1, 4) is the rate of change of f(x, y) with respect to x with y held fixed with a value of 4. f,(1, 4) is the rate of change of f(x, y) with respect to y with x held fixed with a
value of 1.
O f,(1, 4) is the rate of change of f(x, y) with respect to x with y held fixed with a value of 1. f,(1, 4) is the rate of change of f(x, y) with respect to y with x held fixed with a value
of 4.
O f,(1, 4) is the rate of change of f(x, y) with respect to x with y held fixed with a value of -39. f,(1, 4) is the rate of change of f(x, y) with respect to y with x held fixed with a
value of 2.](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F096386ee-a7d8-4324-afae-9f4cb3fd0785%2Fa910306c-4abc-42b6-8a5e-1c989f95057e%2F6x6rew_processed.jpeg&w=3840&q=75)
Transcribed Image Text:Let f(x, y) = 9 – x² + xy – 5y2.
(a) Find f.(1, 4) and f,(1, 4).
fx(1, 4)
f,(1, 4) =
(b) Interpret the numbers in part (a) as slopes.
f,(1, 4) is the slope of the tangent line to the curve of intersection of the surface z = 9 - x² + xy – 5y2 and the plane y
= 4 at the point (1, 4, –68). f,(1, 4) is the slope of the
tangent line to the curve of intersection of the surface z = 9 – x² + xy – 5y and the plane x = 1 at the point (1, 4, -68).
O f,(1, 4) is the slope of the tangent line to the curve of intersection of the surface z = 9 – x + xy – 5y and the plane y = 1 at the point (1, 4, –68). f (1, 4) is the slope of the
tangent line to the curve of intersection of the surface z =
9 - x2 + xy - 5y2 and the plane x = 1 at the point (1, 4, -68).
O f,(1, 4) is the slope of the tangent line to the curve of intersection of the surface z =
9 – x2 + xy – 5y2 and the plane y = 0 at the point (1, 4, –-68). f(1, 4) is the slope of the
tangent line to the curve of intersection of the surface z =
9 – x2 + xy - 5y2 and the plane x = 1 at the point (1, 4, -68).
O f,(1, 4) is the slope of the tangent line to the curve of intersection of the surface z =
9
x2 + xy – 5y2 and the plane y = 4 at the point (1, 4, 0). f(1, 4) is the slope of the
tangent line to the curve of intersection of the surface z =
9 – x2 + xy - 5y2 and the plane x = 1 at the point (1, 4, 0).
(c) Interpret the numbers in part (a) as rates of change.
O f,(1, 4) is the rate of change of f(x, y) with respect to x with y held fixed with a value of 4. f,(1, 4) is the rate of change of f(x, y) with respect to y with x held fixed with a value
of 0.
O f,(1, 4) is the rate of change of f(x, y) with respect to x with y held fixed with a value of 4. f,(1, 4) is the rate of change of f(x, y) with respect to y with x held fixed with a
value of 1.
O f,(1, 4) is the rate of change of f(x, y) with respect to x with y held fixed with a value of 1. f,(1, 4) is the rate of change of f(x, y) with respect to y with x held fixed with a value
of 4.
O f,(1, 4) is the rate of change of f(x, y) with respect to x with y held fixed with a value of -39. f,(1, 4) is the rate of change of f(x, y) with respect to y with x held fixed with a
value of 2.
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