Find the absolute maximum value and the absolute minimum value, if any, of the function. (If an answer does not exist, enter DNE.)

g(x) = x sqrt(9 − x2) on [0, 3]
maximum:
minimum:

8 answers

g(x) = √(9-x^2)
g'(x) = -x/√(9-x^2)
You know that on [0,3] this is just a 1/4 circle of radius 3, so there is no local max or min.
abs max = 3
abs min = 0

Don't get caught up in the calculus, and forget your Algebra I.
max as 3 is not correct
rubbish
√(9-0^2) = 3
Is the interval closed? If it supposed to be (0,3] then DNE would be correct.
The limit of g(x) is 3, but there is no "largest" number less than 3.
the interval are closed
sorry. I missed the extra x
i wrote it exactly as it was presented and after checking 3 is not the max
all good i cant say anything i am the one struggling with the problem
g(x) = x√(9-x^2)
g' = (9-2x^2)/√(9-x^2)
local max at x = 3/√2
g(0) = 0
g(3) = 0
so abs max is 9/2
abs min = 0