- #1
madah12
- 326
- 1
Homework Statement
y=xn
<=>
ln(y)=nln(x)
<=>d/dx ln(y) = d/dx n ln(x) <=> y'/y=n/x
<=> y'=y*n/x=x^n*x/x=nx^(n-1)
Homework Equations
The Attempt at a Solution
but doesn't this proof only hold for positive x? because ln a negative number is undefined or am I missing something?