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 Mar 6 answered Fourier application in biology Jan 17 comment The volume of the solid obtained by revolving the region bounded by $y^2=x$ and $x=2{y}$ about the $y$-axis. The interval of integration is [0, 2], not [0, 1]; the result seems correct. Jan 17 comment Let $a, b$ and $c$ be the lengths of the sides of an arbitrary triangle. Pick out the true statements. What will the value of $x$ be if (i) $a=b=c$, or (ii) $a=b\gg c$? Sep 1 awarded Yearling Jun 19 awarded Necromancer Jan 2 awarded Good Answer Nov 20 comment Negative real parts and of the solution of a polynomial and stable matrices This is called "the Routh-Hurwitz criterion". For a proof, see p.78 (Theorem 11) of this book. Nov 18 revised Problem integrating by parts $e^{-2x}$ added 2 characters in body Nov 18 answered Problem integrating by parts $e^{-2x}$ Nov 18 comment Proof of Convergence: Babylonian Method $x_{n+1}=\frac{1}{2}(x_n + \frac{a}{x_n})$ @Clash en.wikipedia.org/wiki/… Nov 16 revised Proof of Convergence: Babylonian Method $x_{n+1}=\frac{1}{2}(x_n + \frac{a}{x_n})$ added 6 characters in body Nov 16 revised Proof of Convergence: Babylonian Method $x_{n+1}=\frac{1}{2}(x_n + \frac{a}{x_n})$ deleted 5 characters in body Nov 16 revised Proof of Convergence: Babylonian Method $x_{n+1}=\frac{1}{2}(x_n + \frac{a}{x_n})$ added 286 characters in body Nov 16 revised Proof of Convergence: Babylonian Method $x_{n+1}=\frac{1}{2}(x_n + \frac{a}{x_n})$ added 120 characters in body Nov 16 answered Proof of Convergence: Babylonian Method $x_{n+1}=\frac{1}{2}(x_n + \frac{a}{x_n})$ Nov 15 comment Elegant way to prove this inequality You're welcome. Nov 13 revised Elegant way to prove this inequality added 428 characters in body Nov 13 answered Elegant way to prove this inequality Nov 12 awarded Enlightened Nov 12 awarded Nice Answer