Hey guys can you help me with the questions on this Math midterm?
What exactly do you need help with? This is one of your first posts, and you simply post the question and ask for help. It seems like you just want the answers.
For example, the question: Find the derivative of I would treat it as a product like , and then you find the derivative by applying the product and power rules.
"orthogonal" means "perpendicular." so you want all the points on
where the slope (that is, the derivative) is 30. please tell me you know why we need it to be 30
the definition says:
now plug in and and take the limit. (you will need to simplify before you can do that, of course)
in case you have never seen that definition, you must have used this one. it is an alternate definition equivalent to the one above.
(a) note that increases a lot faster than . alternatively, note that as the doesn't really matter. thus you have for positive 's
(b) more straightforward solution: multiply by the cojugate of the denominator over itself.
alternate solution: note that
you want to find and so that the function is continuous and the derivative limit for both parts exist and are equal.
first find (you will need the chain rule). then you can answer the problem. i hope you know how to tell something is an extreme value from the derivative, and that you know a function is increasing wherever the derivative is positive and decreasing where it is negative
by tweaking our definition for derivative a bit, we obtain the linear approximation formula:
now, is the value that we want to find for, while is a value close to that we already know and for
so there's how you should approach these problems. good luck!