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Oct
9
comment Mathematics Engineering: How do you prove the power rule?
To apply log (I presume log base 10) $y$ has to be positive. How do you know that $y$ is positive?
Oct
9
comment Mathematics Engineering: How do you prove the power rule?
@RossMillikan: I just looked at it. The generalization part is vague.
Oct
9
asked Mathematics Engineering: How do you prove the power rule?
Oct
9
awarded  Scholar
Sep
23
comment Is $|x^r|=|x|^r$ for real numbers $x$ and $r$?
Thank you to both Stefan Geschke and Shaun Ault.
Sep
23
awarded  Student
Sep
23
asked Is $|x^r|=|x|^r$ for real numbers $x$ and $r$?