For min/max values solve for
Let
f(x) = 3x^3 - 18 squarerootx
for 0 equal/less x equal/less 4.
(a) Find any local maxima, minima or points of inflexion.
(b) Sketch the function, clearly marking and labeling the domain and range
and the global maximum and minimum.
-18 is not little, it's just a regular -18.
Yup I know it equals 1 sorry it was a typo before. So subbing 1 back into the original equation I got =-15 so that means there is a local maximum there? My textbook says to find the 2nd derivative and then sub the x = 1 into that derivative. if y'' < 0 it is a maximum, etc etc
So what is the 2nd derivative? 18x... what is the rest? Square roots confuse me!
What makes you think it is a maximum?
Then think .My textbook says to find the 2nd derivative and then sub the x = 1 into that derivative. if y'' < 0 it is a maximum, etc etc
So what is the 2nd derivative? 18x... what is the rest? Square roots confuse me!
That, I suspect, was how pickslides got the first derivative: so .
(And, of course, .)
Now,
What is that?