- #1
nesan
- 75
- 0
Homework Statement
http://www.wolframalpha.com/input/?i=((1+/+x)+++2)+/+(3(2x+++lnx))^(2/3)+=+0
Solve the equation f'(x) = 0
f(x) = (ln x + 2x)^(1/3)
The Attempt at a Solution
As you can see, for the function
((1 / x) + 2) / (3(2x + lnx))^(2/3) = 0
I can get a value for x which is - 1 / 2
But my textbook says "no solution"
Why is that?