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 Apr 5 comment complete the sequence: (8, 6, 2, …) thanks very much! Apr 4 comment complete the sequence: (8, 6, 2, …) thanks! sorry for the late, i'm asking why if i plot in wolframalpha $sign(sin(x^2))$ it plot a square wave.. Apr 2 accepted complete the sequence: (8, 6, 2, …) Apr 2 comment complete the sequence: (8, 6, 2, …) wow! perffect, thanks! Two remained doubt (sorry for my poor math background): 1) why $sign(sin(x^2))$ give a square? 2) how can i achive parametric formulas $x = \dots$, $y=\dots$ ? Apr 2 asked complete the sequence: (8, 6, 2, …) Mar 6 comment How can I prove the formula for calculating successive entries in a given row of Pascal's triangle? good tricky and mnemonic way! Mar 6 accepted How can I prove the formula for calculating successive entries in a given row of Pascal's triangle? Mar 4 comment How can I prove the formula for calculating successive entries in a given row of Pascal's triangle? @Arturo: thanks for editing, english is not my main language! Mar 4 comment How can I prove the formula for calculating successive entries in a given row of Pascal's triangle? i didn't know exactly what are best tags for this post Mar 4 asked How can I prove the formula for calculating successive entries in a given row of Pascal's triangle? Feb 9 accepted how many bits to write $\sqrt x$? Feb 7 awarded Critic Feb 7 awarded Teacher Feb 7 answered how many bits to write $\sqrt x$? Feb 7 comment how many bits to write $\sqrt x$? ohu yeah ross, i've got the point and i was writing last comment while you get me the solutions! thanks to all! Feb 7 comment how many bits to write $\sqrt x$? mhmmm one moment.. no! $\sqrt x$ is long..$\sqrt x$! so the formula is $log_2 \sqrt x$ = $\frac{log x}{2}$ Feb 7 comment how many bits to write $\sqrt x$? @Yuval: "how big can $\sqrt x$ be" is the point :-) sure more less that $\frac{x}{2}$.. i can't see a link with exponential.. the problem is that i don't manage to solve $log^{\frac{1}{2}}x$. Feb 7 awarded Editor Feb 7 revised how many bits to write $\sqrt x$? added 27 characters in body Feb 7 asked how many bits to write $\sqrt x$?