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 Aug 16 answered Find the equation $ax + by + cz = d$ of the plane which has equal distance to the points $A(1, 2, 3)$ and $B(4, 5, 6)$ Aug 12 revised To find the best success list among players? added 8 characters in body Aug 12 asked To find the best success list among players? Aug 7 accepted Tangent points on circle that placed on Earth surface Aug 7 accepted To find the general formula of $\overbrace{g(g(g(…g(x))}^\text{n}=g_n(x)=\frac{A_{n}.x+B_{n}}{C_{n}.x+D_{n}}$ Aug 7 comment How did Euler give a sum to the divergent series $…x^{-3}+x^{-2}+x^{-1}+1+x^1+x^2+x^3.. = 0$? I asked a question about that subject..: . I got also the same result as euler gotvia using series solution in first method. Please see my question . math.stackexchange.com/questions/1359401/… Jul 25 awarded Enlightened Jul 25 awarded Nice Answer Jul 14 revised Is $\sum_{n=-\infty}^\infty x^n=0$? added 161 characters in body Jul 14 comment Fourier transforms of $f(t)=\frac{\sin{at}}{t}$ +1 very nice answer. You wrote all steps in clear way. Jul 14 revised Is $\sum_{n=-\infty}^\infty x^n=0$? added 161 characters in body Jul 13 comment Is $\sum_{n=-\infty}^\infty x^n=0$? I updated my question . Can there be any connection with Ramanujan’s mysterious expression about infinity sum of numbers with my infinity sum result? . It was strange in the begining before checking the result for extention zeta function Jul 13 revised Is $\sum_{n=-\infty}^\infty x^n=0$? added 570 characters in body Jul 13 revised Is $\sum_{n=-\infty}^\infty x^n=0$? added 4 characters in body Jul 13 revised Is $\sum_{n=-\infty}^\infty x^n=0$? added 4 characters in body Jul 13 asked Is $\sum_{n=-\infty}^\infty x^n=0$? Jul 1 awarded Popular Question Jun 17 answered Given $x^2 + 4x + 6$ as factor of $x^4 + ax^2 + b$, then $a + b$ is Jun 16 answered High School Trigonometry ( Law of cosine and sine) Jun 16 revised Going from $f = u(x,y) +iv(x,y)$ to $f(z) = f(x+iy)$ added 2 characters in body