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
85 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 probability of rolling a 4 or a 6 on a fair six-sided die, assuming each outcome is equally likely?
+
What is the value of cube root of x when x = 64?
+
Find the value of x such that f(x) = 10^x + e^x is minimized. (
+
New questions in Mathematics
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?
Determine all solutions to the inequality |2x + 6| − |x + 1| < 6. Write your final answer in interval notation
90 divided by 40
How do you think the company has increased or decreased its income?
Consider numbers from 1 to 2023. We delete 3 consecutive numbers so, that the avarage of the left numbers is a whole number
Perpetual annuities are a series of payments whose duration has no end. Explain how can we calculate them, if they have no end?
4x/2+5x-3/6=7/8-1/4-x
Log5 625
It is known that the content of milk that is actually in a bag distributes normally with an average of 900 grams and variance 25 square grams. Suppose that the cost in pesos of a bag of milk is given by 𝐶(𝑥) = { 3800 𝑠𝑖 𝑥 ≤ 890 4500 𝑠𝑖 𝑥 > 890 Find the expected cost.
How many square feet of floor area are there in three two-storey apartment houses, each of which is 38 feet wide and 76 feet long?
Given (3x+2)E [2;14] how much money (in soles) does Sophia have if numerically it is the greatest value of x?
The maximum gauge pressure of a hydraulic ramp is 16 atm, with a support area whose diameter is 20 cm. What is the mass of the heaviest vehicle that can be lifted?
Use a pattern approach to explain why (-2)(-3)=6
-1%2F2x-4%3D18
(a) List the set of possible rational zeros of the polynomial function F(x) = 2x3 - 11x2 + 13x - 4. (b) Find all rational zeros of F(x). Only do part B
The business college computing center wants to determine the proportion of business students who have personal computers (PC's) at home. If the proportion is greater than 35%, then the lab will modify a proposed enlargement of its facilities. Suppose a hypothesis test is conducted and the test statistic is z= 2.6. Find the P-value for this test.
48 kg of 30% sulfuric acid in a mixture of 10% and 40% sulfuric acid arose. How many kilograms were each of the original solutions?
Identify the slope and y intercept y=11+2/3x
How much does 7.2 moles of ammonium dichromate weigh? (NH4)2Cr2O7
Slope (7,3) and (9,5)