louie3006 Messages 54 Reaction score 0 Thread starter Mar 29, 2009 #1 Homework Statement y= x √6-x^2 Homework Equations The Attempt at a Solution
tiny-tim Science Advisor Homework Helper Messages 25,837 Reaction score 258 Mar 29, 2009 #2 Hi louie3006! louie3006 said: y= x √6-x^2 erm … what's the question?
louie3006 Messages 54 Reaction score 0 Mar 29, 2009 #3 we need to find out if the function is increasing or decreasing by using the first derivative test and then setting it equal to zero, but i don't know how to get the 1st derivative of this thing ? any thoughts on that ?
we need to find out if the function is increasing or decreasing by using the first derivative test and then setting it equal to zero, but i don't know how to get the 1st derivative of this thing ? any thoughts on that ?
e(ho0n3 Messages 1,349 Reaction score 0 Mar 29, 2009 #4 Do you know how to compute derivatives? If you do, then you should be able to compute the derivative of 'that thing'.
Do you know how to compute derivatives? If you do, then you should be able to compute the derivative of 'that thing'.
rey242 Messages 40 Reaction score 0 Mar 29, 2009 #5 look at product and chain rule, then everything should work out.
HallsofIvy Science Advisor Homework Helper Messages 42,895 Reaction score 983 Mar 30, 2009 #7 Writing it as [itex]x(6- x^2)^{1/2}[/itex] helps a lot.