The first order approximation of f(x,y) around some point (a,b) is:
$$f(x,y) = f(a,b) + f_x(a,b) (x-a) + f_y(a,b) (y-b)$$
In your case:
$$f(x,y) = f(-9,9) + f_x(-9,9) (x - -9) + f_y(-9,9) (y - 9)$$
Fill in your values to get the results...
reinout-g: Thank you I like Serena ,I tried what you did and this is what I got;I had to add the extra variables u1 and u2 since otherwise I could not eliminate the top row (maybe there was an easier way to do that).My slack variables saved me by directly giving me my u1 and u2 values.Thanks again,truly appreciated Reinout
Thank you I like Serena ,I tried what you did and this is what I got;I had to add the extra variables u1 and u2 since otherwise I could not eliminate the top row (maybe there was an easier way to do that).My slack variables saved me by directly giving me my u1 and u2 values.Thanks again,truly appreciated Reinout
Jedithious: Hello, I was wondering if anyone knows of any apps that can graph such things as ellipses, circles, and hyperbolas? I certainly have a few apps in which you can enter a function and get a graph for it, but what about being able to input such things as the focus, directrix, and endpoints in order to come up with conic sections?Thanks
Hello, I was wondering if anyone knows of any apps that can graph such things as ellipses, circles, and hyperbolas? I certainly have a few apps in which you can enter a function and get a graph for it, but what about being able to input such things as the focus, directrix, and endpoints in order to come up with conic sections?Thanks
reinout-g: I had an exam yesterday of the class 'introduction to operations research' and one of the questions was the following;Now I don't know whether there is anyone at this forum with knowledge of the simplex method, but I'm still wondering how this question can be done.
I had an exam yesterday of the class 'introduction to operations research' and one of the questions was the following;Now I don't know whether there is anyone at this forum with knowledge of the simplex method, but I'm still wondering how this question can be done.
reinout-g: Almost had it
Almost had it
kateeelllyyynn: 99% CI for the population proportion of voters opposing a new tax was calculated to be (.68,.76). What was the sample proportion of voters who oppose the new tax
99% CI for the population proportion of voters opposing a new tax was calculated to be (.68,.76). What was the sample proportion of voters who oppose the new tax
Princess Sophie E: The electrostatic force between two charges Q1 and Q2 at a distance r apart is given by F=(Q1*Q2)/(4Pie*Eo*r^2). What is the unit of E?
The electrostatic force between two charges Q1 and Q2 at a distance r apart is given by F=(Q1*Q2)/(4Pie*Eo*r^2). What is the unit of E?
kat:}: :| [size=150]a wheelbarrow can carry up to 300 pounds of weight. A bag of soil weighs 20 pounds. write and solve an inequality to represent the number of bags of soil the wheelbarrow can carry.[/size]
:| [size=150]a wheelbarrow can carry up to 300 pounds of weight. A bag of soil weighs 20 pounds. write and solve an inequality to represent the number of bags of soil the wheelbarrow can carry.[/size]
Irreverent Statistic: What is the probability that "I like Serena" will make a comment on a question that either states the obvious or is trivial and useless.
What is the probability that "I like Serena" will make a comment on a question that either states the obvious or is trivial and useless.
personunknown: The mass of a single rhodium atom is 1.71E-22 grams. How many rhodium atoms would there be in 238 milligrams of rhodium?
The mass of a single rhodium atom is 1.71E-22 grams. How many rhodium atoms would there be in 238 milligrams of rhodium?
Melody: All questions answered EXCEPT a T-test ?
All questions answered EXCEPT a T-test ?