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 61 Is it possible to represent every irrational number as a (limit of) an infinite sum of rational numbers? 31 Where is the absolute value when computing antiderivatives? 23 Factorial question: number of trailing zeroes in 125! 14 Can a polynomial be expressed as an infinite sum of non-polynomial functions? 13 Why does Wolfram Alpha say that $\infty^\infty$ results in “complex infinity”?

Reputation (12,285)

 +10 Slick way to calculate $\lim_{T\to\infty}\frac{1}{2T}\int_{-T}^T(\sin(t+1)-1)^4\,dt$ by hand? +5 False Proof that $\sqrt{4}$ is Irrational +10 Is there a way to insert Log base-something into Google Calculator? +10 Show $\sum_{k=m}^n {k \choose r} = {n+1 \choose r+1} - {m \choose r+1}$

Questions (36)

 26 Odd Number of Cats? 20 Sheaf Theory for Complex Analysis 11 Proof of identity for $\pi$: $\frac{\pi}{3} = \frac{2}{\sqrt{2+\sqrt{3}}}\frac{2}{\sqrt{2+\sqrt{2+\sqrt{3}}}}\cdots$ 7 False Proof that $\sqrt{4}$ is Irrational 7 “Ordering” of Complex Plane

Tags (218)

 272 calculus × 140 66 limits × 42 122 integration × 69 64 irrational-numbers × 2 88 sequences-and-series × 63 58 real-analysis × 45 77 algebra-precalculus × 48 53 trigonometry × 37 67 complex-analysis × 42 52 derivatives × 35

Accounts (56)

 Mathematics 12,285 rep 33 gold badges1818 silver badges5353 bronze badges Mathematics Educators 226 rep 22 silver badges77 bronze badges Stack Overflow 106 rep 44 bronze badges Physics 103 rep 55 bronze badges Mathematica 101 rep 33 bronze badges