Question

Determine the derivatives of the function 𝑓(𝑥,𝑦)=2𝑥𝑦−5𝑥3𝑦2+5𝑥+7𝑦 and obtain the values at point (2,3)

275

likes
1373 views

Answer to a math question Determine the derivatives of the function 𝑓(𝑥,𝑦)=2𝑥𝑦−5𝑥3𝑦2+5𝑥+7𝑦 and obtain the values at point (2,3)

Expert avatar
Andrea
4.5
83 Answers
Para determinar as derivadas parciais da função 𝑓(𝑥,𝑦)=2𝑥𝑦−5𝑥^3𝑦^2+5𝑥+7𝑦 em relação a 𝑥 e 𝑦, podemos calcular as derivadas parciais de cada termo em relação a cada variável e então somá-las.

1. Derivada parcial em relação a 𝑥:
\frac{{\partial f}}{{\partial x}} = \frac{{\partial (2xy)}}{{\partial x}} - \frac{{\partial (5x^3y^2)}}{{\partial x}} + \frac{{\partial (5x)}}{{\partial x}} + \frac{{\partial (7y)}}{{\partial x}}
\frac{{\partial f}}{{\partial x}} = 2y - 15x^2y^2 + 5

2. Derivada parcial em relação a 𝑦:
\frac{{\partial f}}{{\partial y}} = \frac{{\partial (2xy)}}{{\partial y}} - \frac{{\partial (5x^3y^2)}}{{\partial y}} + \frac{{\partial (5x)}}{{\partial y}} + \frac{{\partial (7y)}}{{\partial y}}
\frac{{\partial f}}{{\partial y}} = 2x - 10x^3y + 7

Agora, para encontrar os valores no ponto (2,3), substituímos 𝑥=2 e 𝑦=3:

\frac{{\partial f}}{{\partial x}}\Big|_{(2,3)}=2(3)-15(2)^2(3)^2+5=-529

\frac{{\partial f}}{{\partial y}}\Big|_{(2,3)}=2(2)-10(2)^3(3)+7=-229

Portanto, as derivadas parciais da função 𝑓(𝑥,𝑦) em relação a 𝑥 e 𝑦 no ponto (2,3) são -169 e -469, respectivamente.

\textbf{Resposta:}\frac{{\partial f}}{{\partial x}}\Big|_{(2,3)}=-529\quad\text{e}\quad\frac{{\partial f}}{{\partial y}}\Big|_{(2,3)}=-229

Frequently asked questions (FAQs)
What is the value of 'a' in the parabolic function y = ax^2 if the vertex is at (2,5) and the point (-1,12) lies on the graph?
+
What is the length of the angle bisector that divides side AB into segments of lengths 3 and 4?
+
Math question: Solve the cubic equation x^3 + 4x^2 - 3x - 18 = 0.
+
New questions in Mathematics
A normal random variable x has a mean of 50 and a standard deviation of 10. Would it be unusual to see the value x = 0? Explain your answer.
If you have a bag with 18 white balls and 2 black balls. What is the probability of drawing a white ball? And extracting a black one?
5/8 x 64
Let I ⊂ R be a bounded and nonempty interval. Show that there are numbers a, b ∈ R with a ≤ b and I =[a,b] or I =[a,b) or I =(a,b] or I =(a,b)
Consider numbers from 1 to 2023. We want to delete 3 consecutive, so that the avarage of the left numbers is a whole number. How do we do that
Answer the following questions regarding the expression below. 0.1 (a) Write the number as a fraction.
Solve this mathematical problem if 3/5 of a roll of tape measures 2m. How long is the complete roll? Draw the diagram
Find the equation of the line perpendicular to −5𝑥−3𝑦+5=0 passing through the point (0,−2)
prove that if n odd integer then n^2+5 is even
-3(-4x+5)=-6(7x-8)+9-10x
(2m+3)(4m+3)=0
-1%2F2x-4%3D18
3%2B2
A,B,C and D are the corners of a rectangular building. Find the lengths the diagonals if AB measures 38' - 9" and AD measures 56' - 3"
The blood types of individuals in society are as follows: A: 30%, B: 25%, AB: 20%, 0: 25%. It is known that the rates of contracting a certain disease according to blood groups are as follows: A: 7%, B: 6%, AB: 7%, 0: 4%. Accordingly, if a person selected by chance is known to have this disease, what is the probability of having blood group O?
16-(x²+x+2)²
Hola👋🏻 Toca en "Crear Nueva Tarea" para enviar tu problema de matemáticas. ¡Uno de nuestros expertos comenzará a trabajar en ello de inmediato!
t+72/t=-17
Question 3 A square has a perimeter given by the algebraic expression 24x – 16. Write the algebraic expression that represents one of its sides.
Construct a set of six pieces of data with​ mean, median, and midrange of 67 and where no two pieces of data are the same.