Explanation Given that the function is F ( x , y ) = y ln ( x + 2 y ) . Here, the dependent variable is z and the independent variables are x and y . Differentiate F ( x , y ) = y ln ( x + 2 y ) partially with respect to x as follows. ∂ F ∂ x = ∂ ∂ x ( y ln ( x + 2 y ) ) = y ∂ ∂ x ( ln ( x + 2 y ) ) = y ⋅ 1 x + 2 y ⋅ ∂ ∂ x ( x + 2 y ) = y x + 2 y ⋅ ( 1 ) That is, ∂ F ∂ x = y x + 2 y . Differentiate ∂ F ∂ x = y x + 2 y partially with respect to x as follows. ∂ 2 F ∂ x 2 = ∂ ∂ x ( y x + 2 y ) = ( x + 2 y ) ∂ ∂ x ( y ) − y ∂ ∂ x ( x + 2 y ) ( x + 2 y ) 2 = ( x + 2 y ) ( 0 ) − y ( 1 ) ( x + 2 y ) 2 = − y ( x + 2 y ) 2 That is, ∂ 2 F ∂ x 2 = − y ( x + 2 y ) 2 . Differentiate ∂ F ∂ x = y x + 2 y partially with respect to y as follows. ∂ 2 F ∂ y ∂ x = ∂ ∂ y ( y x + 2 y ) = x + 2 y ∂ ∂ y ( y ) − y ∂ ∂ y ( x + 2 y ) ( x + 2 y ) 2 = x + 2 y ( 1 ) − y ( 2 ) ( x + 2 y ) 2 = x ( x + 2 y ) 2 Differentiate F ( x , y ) = y ln ( x + 2 y ) partially with respect to y as follows. ∂ F ∂ y = ∂ ∂ y ( y ln ( x + 2 y ) ) = y ∂ ∂ y ( ln ( x + 2 y ) ) + ln ( x + 2 y ) ∂ ∂ y ( y ) = y ⋅ 1 x + 2 y ∂ ∂ y ( x + 2 y ) + ln ( x + 2 y ) ( 1 ) = y x + 2 y ( 2 ) + ln ( x + 2 y ) That is, ∂ F ∂ y = 2 y x + 2 y + ln ( x + 2 y ) . Differentiate ∂ F ∂ y = 2 y x + 2 y + ln ( x + 2 y ) partially with respect to y again as follows

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Question

Chapter 29.3, Problem 32E

To determine

All the second partial derivatives of the function, ∂2F∂x2,∂2F∂y2 and ∂2F∂x∂y.

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Chapter 29.3, Problem 31E

Chapter 29.3, Problem 33E

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Chapter 29 Solutions

Pearson eText for Basic Technical Mathematics with Calculus -- Instant Access (Pearson+)

Ch. 29.1 - Practice Exercise If f(x, y) = 4xy2 – 3x2y, find...Ch. 29.1 - Prob. 1E Ch. 29.1 - Prob. 2E Ch. 29.1 - Prob. 3E Ch. 29.1 - Prob. 4E Ch. 29.1 - Prob. 5E Ch. 29.1 - Prob. 6E Ch. 29.1 - Prob. 7E Ch. 29.1 - Prob. 8E Ch. 29.1 - Prob. 9E

Ch. 29.1 - Prob. 10E Ch. 29.1 - Prob. 11E Ch. 29.1 - Prob. 12E Ch. 29.1 - Prob. 13E Ch. 29.1 - Prob. 14E Ch. 29.1 - Prob. 15E Ch. 29.1 - Prob. 16E Ch. 29.1 - Prob. 17E Ch. 29.1 - Prob. 18E Ch. 29.1 - Prob. 19E Ch. 29.1 - Prob. 20E Ch. 29.1 - Prob. 21E Ch. 29.1 - Prob. 22E Ch. 29.1 - Prob. 23E Ch. 29.1 - Prob. 24E Ch. 29.1 - Prob. 25E Ch. 29.1 - Prob. 26E Ch. 29.1 - Prob. 27E Ch. 29.1 - Prob. 28E Ch. 29.1 - Prob. 29E Ch. 29.1 - Prob. 30E Ch. 29.1 - Prob. 31E Ch. 29.1 - Prob. 32E Ch. 29.1 - Prob. 33E Ch. 29.1 - Prob. 34E Ch. 29.1 - Prob. 35E Ch. 29.1 - Prob. 36E Ch. 29.1 - Prob. 37E Ch. 29.1 - Prob. 38E Ch. 29.1 - Prob. 39E Ch. 29.1 - Prob. 40E Ch. 29.1 - Prob. 41E Ch. 29.1 - Prob. 42E Ch. 29.1 - Prob. 43E Ch. 29.1 - Prob. 44E Ch. 29.2 - Prob. 1PE Ch. 29.2 - Prob. 2PE Ch. 29.2 - Prob. 1E Ch. 29.2 - Prob. 2E Ch. 29.2 - Prob. 3E Ch. 29.2 - Prob. 4E Ch. 29.2 - Prob. 5E Ch. 29.2 - Prob. 6E Ch. 29.2 - Prob. 7E Ch. 29.2 - Prob. 8E Ch. 29.2 - Prob. 9E Ch. 29.2 - Prob. 10E Ch. 29.2 - Prob. 11E Ch. 29.2 - Prob. 12E Ch. 29.2 - Prob. 13E Ch. 29.2 - Prob. 14E Ch. 29.2 - Prob. 15E Ch. 29.2 - Prob. 16E Ch. 29.2 - Prob. 17E Ch. 29.2 - Prob. 18E Ch. 29.2 - Prob. 19E Ch. 29.2 - Prob. 20E Ch. 29.2 - Prob. 21E Ch. 29.2 - Prob. 22E Ch. 29.2 - Prob. 23E Ch. 29.2 - Prob. 24E Ch. 29.2 - Prob. 25E Ch. 29.2 - Prob. 26E Ch. 29.2 - Prob. 27E Ch. 29.2 - Prob. 28E Ch. 29.2 - Prob. 29E Ch. 29.2 - Prob. 30E Ch. 29.2 - Prob. 31E Ch. 29.2 - Prob. 32E Ch. 29.2 - Prob. 33E Ch. 29.2 - Prob. 34E Ch. 29.2 - Prob. 35E Ch. 29.2 - Prob. 36E Ch. 29.2 - Prob. 37E Ch. 29.2 - Prob. 38E Ch. 29.2 - Prob. 39E Ch. 29.2 - Prob. 40E Ch. 29.2 - Prob. 41E Ch. 29.2 - Prob. 42E Ch. 29.2 - Prob. 43E Ch. 29.2 - Prob. 44E Ch. 29.2 - Prob. 45E Ch. 29.2 - Prob. 46E Ch. 29.3 - If z = 4x2 + x sin y, find ∂z/∂x and ∂z/∂y. Ch. 29.3 - Prob. 2PE Ch. 29.3 - Prob. 1E Ch. 29.3 - Prob. 2E Ch. 29.3 - Prob. 3E Ch. 29.3 - Prob. 4E Ch. 29.3 - Prob. 5E Ch. 29.3 - Prob. 6E Ch. 29.3 - Prob. 7E Ch. 29.3 - Prob. 8E Ch. 29.3 - Prob. 9E Ch. 29.3 - Prob. 10E Ch. 29.3 - Prob. 11E Ch. 29.3 - Prob. 12E Ch. 29.3 - Prob. 13E Ch. 29.3 - Prob. 14E Ch. 29.3 - Prob. 15E Ch. 29.3 - Prob. 16E Ch. 29.3 - Prob. 17E Ch. 29.3 - Prob. 18E Ch. 29.3 - Prob. 19E Ch. 29.3 - Prob. 20E Ch. 29.3 - Prob. 21E Ch. 29.3 - Prob. 22E Ch. 29.3 - Prob. 23E Ch. 29.3 - Prob. 24E Ch. 29.3 - Prob. 25E Ch. 29.3 - Prob. 26E Ch. 29.3 - Prob. 27E Ch. 29.3 - Prob. 28E Ch. 29.3 - Prob. 29E Ch. 29.3 - Prob. 30E Ch. 29.3 - Prob. 31E Ch. 29.3 - Prob. 32E Ch. 29.3 - Prob. 33E Ch. 29.3 - Prob. 34E Ch. 29.3 - Prob. 35E Ch. 29.3 - Prob. 36E Ch. 29.3 - In Exercises 35–50, solve the given...Ch. 29.3 - In Exercises 35–50, solve the given...Ch. 29.3 - Prob. 39E Ch. 29.3 - Prob. 40E Ch. 29.3 - In Exercises 35–50, solve the given...Ch. 29.3 - Prob. 42E Ch. 29.3 - Prob. 43E Ch. 29.3 - Prob. 44E Ch. 29.3 - Prob. 45E Ch. 29.3 - Prob. 46E Ch. 29.3 - Prob. 47E Ch. 29.3 - Prob. 48E Ch. 29.3 - In Exercises 35–50, solve the given...Ch. 29.3 - In Exercises 35–50, solve the given...Ch. 29.4 - Prob. 1PE Ch. 29.4 - Prob. 1E Ch. 29.4 - Prob. 2E Ch. 29.4 - Prob. 3E Ch. 29.4 - Prob. 4E Ch. 29.4 - Prob. 5E Ch. 29.4 - In Exercises 5–18, evaluate the given double...Ch. 29.4 - Prob. 7E Ch. 29.4 - Prob. 8E Ch. 29.4 - Prob. 9E Ch. 29.4 - Prob. 10E Ch. 29.4 - Prob. 11E Ch. 29.4 - Prob. 12E Ch. 29.4 - Prob. 13E Ch. 29.4 - Prob. 14E Ch. 29.4 - Prob. 15E Ch. 29.4 - Prob. 16E Ch. 29.4 - Prob. 17E Ch. 29.4 - Prob. 18E Ch. 29.4 - Prob. 19E Ch. 29.4 - Prob. 20E Ch. 29.4 - Prob. 21E Ch. 29.4 - Prob. 22E Ch. 29.4 - Prob. 23E Ch. 29.4 - Prob. 24E Ch. 29.4 - Prob. 25E Ch. 29.4 - Prob. 26E Ch. 29.4 - Prob. 27E Ch. 29.4 - Prob. 28E Ch. 29.4 - Prob. 29E Ch. 29.4 - Prob. 30E Ch. 29.4 - Prob. 31E Ch. 29.4 - Prob. 32E Ch. 29.4 - Prob. 33E Ch. 29.4 - Prob. 34E Ch. 29 - Prob. 1RE Ch. 29 - Prob. 2RE Ch. 29 - Prob. 3RE Ch. 29 - Prob. 4RE Ch. 29 - Prob. 5RE Ch. 29 - Prob. 6RE Ch. 29 - Prob. 7RE Ch. 29 - Prob. 8RE Ch. 29 - Prob. 9RE Ch. 29 - Prob. 10RE Ch. 29 - Prob. 11RE Ch. 29 - Prob. 12RE Ch. 29 - Prob. 13RE Ch. 29 - Prob. 14RE Ch. 29 - Prob. 15RE Ch. 29 - Prob. 16RE Ch. 29 - Prob. 17RE Ch. 29 - Prob. 18RE Ch. 29 - Prob. 19RE Ch. 29 - Prob. 20RE Ch. 29 - Prob. 21RE Ch. 29 - Prob. 22RE Ch. 29 - Prob. 23RE Ch. 29 - Prob. 24RE Ch. 29 - Prob. 25RE Ch. 29 - Prob. 26RE Ch. 29 - Prob. 27RE Ch. 29 - Prob. 28RE Ch. 29 - Prob. 29RE Ch. 29 - Prob. 30RE Ch. 29 - Prob. 31RE Ch. 29 - Prob. 32RE Ch. 29 - Prob. 33RE Ch. 29 - Prob. 34RE Ch. 29 - Prob. 35RE Ch. 29 - Prob. 36RE Ch. 29 - Prob. 37RE Ch. 29 - Prob. 38RE Ch. 29 - Prob. 39RE Ch. 29 - Prob. 40RE Ch. 29 - Prob. 41RE Ch. 29 - Prob. 42RE Ch. 29 - Prob. 43RE Ch. 29 - Prob. 44RE Ch. 29 - Prob. 45RE Ch. 29 - Prob. 46RE Ch. 29 - Prob. 47RE Ch. 29 - Prob. 48RE Ch. 29 - Prob. 49RE Ch. 29 - Prob. 50RE Ch. 29 - Prob. 51RE Ch. 29 - Prob. 52RE Ch. 29 - Prob. 53RE Ch. 29 - Prob. 54RE Ch. 29 - Prob. 55RE Ch. 29 - Prob. 1PT Ch. 29 - Prob. 2PT Ch. 29 - Prob. 3PT Ch. 29 - Prob. 4PT Ch. 29 - Prob. 5PT Ch. 29 - Prob. 6PT Ch. 29 - Prob. 7PT Ch. 29 - Prob. 8PT

Knowledge Booster

All the second partial derivatives of the function, ∂ 2 F ∂ x 2 , ∂ 2 F ∂ y 2 and ∂ 2 F ∂ x ∂ y .

All the second partial derivatives of the function, ∂2F∂x2,∂2F∂y2 and ∂2F∂x∂y.

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Chapter 29 Solutions