d975490 wrote:
Could you please elaborate on the following：
f(mn)=f(1/n) then we get -1/(mn)^2= - n^2. Don't understand who we got that result
\(f(x) = - \frac{1}{x^2}\), hence \(f(mn) = -\frac{1}{(mn)^2}\) and \(f(\frac{1}{n})=-\frac{1}{(\frac{1}{n})^2}=-n^2\)
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