- #1
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Homework Statement
Let f be the function defined by f(x) = xe[tex]^{1-x}[/tex] for all real numbers x.
a. Find each interval on which f is increasing.
b. Find the range of F.
c. Find the x-coordinate of each point of inflection of the graph of f
Homework Equations
I don't think there are any.
The Attempt at a Solution
It's been a while since I did calculus, so I might be a bit rusty on this. I'll take this 1 letter at a time.
For part a, if f is incresaing, then its first derivative must be positive. Therefore, I took the derivative of f(x), using the product rule.
f(x) = xe[tex]^{1-x}[/tex]
f'(x) = x(1-x)(-1) + e[tex]^{1-x}[/tex]
f'(x) = -x[tex]^{2}[/tex]+x-1+e[tex]^{1-x}[/tex]
And ... this is where I get stuck. I'm not sure how to proceed from here for part a (I'll attempt the other 2 at a later date).