- #1
brett812718
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Homework Statement
Find the maximum and minimum values of the function F(x)=ln(x/(x^2+1)) on the interval (0,10]
Homework Equations
d/dx[lnu]=u'/u
The Attempt at a Solution
f'(x)=(1-x^2)/[(1+x^2)x]
f'(x)=0 when 1-x^2=0
1=x^2
x=1 which is the maximum
f(1)=-.693
what do I use for the minimum since f(0)=-[tex]\infty[/tex] ? I can't write -[tex]\infty[/tex] because 0 is not included in the interval.