Ask a New Question

Question

Obtain all the first and second order partial derivatives of the function:
f( x, y ) = In(I+xy^2)
10 years ago

Answers

Steve
∂f/∂x = 1/(1+xy^2) * y^2 = y^2/(1+xy^2)
∂f/∂y = 1/(1+xy^2) * 2xy = 2xy/(1+xy^2)

∂2f/∂x2 = -y^4/(1+xy^2)^2
∂2f/∂y^2 = 2x/(1+xy^2) - 4x^2y^2/(1+xy^2)^2
= 2x(1-xy^2)/(1+xy^2)^2

∂2f/∂x∂y = 2y/(1+xy^2) - y^2(2xy)/(1+xy^2)^2
= 2y/(1+xy^2)^2

∂2f/∂y∂x = 2y/(1+xy^2) - (2xy)(y^2)/(1+xy^2)^2
= 2y/(1+xy^2)^2
10 years ago

Related Questions

3. You obtain the following regression statistics for the relationship between defect rate and volum... Which is the best way to obtain a random sample when surveying a high school with 800 students about... Explain how you will obtain a sample of solid sugar from ethanol Why do organisms need to obtain energy via cellular respiration? to break down ATP*** to perfo... What's an obtain mean Think about how you obtain the energy you need to do everyday activities like doing chores, going to... Think about how you obtain the energy you need to do everyday activities like doing chores, going to... how would you obtain sodium carbonate from a mixture of lead2oxide ,sodium carbonate and copper tu... What is the best way to obtain all of the essential amino acids? Multiple choice question. Die...
Ask a New Question
Archives Contact Us Privacy Policy Terms of Use