# Jean-Sébastien

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# 145 Posts

 Oct23 answered Intuition behind product rule of probability Oct22 answered Proof of Aristarchus' Inequality Oct20 answered Are there any open mathematical puzzles? Oct19 answered Determine $a<0$ such that $\int_a^0 f(x) dx = f(a)$ Oct15 answered Is there a fast way to compute coefficient of some term of the product of some series'? Oct15 answered How do I reduce this: $\frac{2}{x\ln(4)}\quad ?$ Oct13 answered Coupon selecting problem Oct5 answered How can we directly see that the number of random walks starting and ending at the origin is ${n\choose n/2}^2$? Oct3 answered Can the limit of a product exist if neither of its factors exist? Sep26 answered Application of Borel Cantelli Lemma in Homework Problem Sep21 answered 10 children divide into 2 teams each. How many divisions possible? Sep20 answered Does differentiation symbol need parentheses or? Sep18 answered Does this hold: $\sum_{n=1}^\infty \sum_{k=1}^n 2^{-n}=\sum_{k=1}^\infty \sum_{n=k}^\infty 2^{-n}$? Sep15 answered What is this strange symbol called :=? Sep14 answered have all 4 digits distinct Sep14 answered Can some clearly explain about lim sup and lim inf?? Sep11 answered Limits, textbook error? Sep9 answered Proving that $\int_a^b\frac{dx}{\sqrt{(x-a)(b-x)}}=\pi$ Sep6 answered How was the first log table put together? Sep4 answered A host invites n couples to a party, She wants