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 50m revised What is the probability that 5 randomly chosen cards in a deck add up to 40 or greater? edited title 58m revised What is the probability that 5 randomly chosen cards in a deck add up to 40 or greater? edited tags 15h revised How to do this triangle question? added 326 characters in body 1d revised Hessian-Matrix positive definite $\iff$ $a$ local minimum? added 2 characters in body 1d revised Sum of zeros of $P(x)$ edited tags May4 revised 5 pears and 1 apple cost as much as 2 pears and 2 apples. If each apple costs $0.75,find the total cost of 100 pears and 450 apples. edited tags Apr30 revised Probability problem without the usual information deleted 3 characters in body; edited title Apr25 revised Convergence: infinite series edited tags Apr25 revised Is$\sum_{k=-\infty}^{0}f(-k)=\sum_{k=0}^{\infty} f(k)$always? edited tags Apr25 revised Evaluation of$ \int_{0}^{\frac{\pi}{4}}\left(\cos 2x \right)^{\frac{11}{2}}\cdot \cos xdx $added 692 characters in body Apr25 revised Evaluation of$ \int_{0}^{\frac{\pi}{4}}\left(\cos 2x \right)^{\frac{11}{2}}\cdot \cos xdx $added 692 characters in body Apr25 revised Textbook +reference book in complex analysis added 11 characters in body Apr25 revised A math contest question related to Ramsey numbers edited tags Apr25 revised how to prove that a relation is antisymmetric? added 7 characters in body Apr25 revised how to prove that a relation is antisymmetric? added 22 characters in body Apr25 revised how to prove that a relation is antisymmetric? added 6 characters in body Apr25 revised Why is$\sinh$often pronounced “shine”? edited tags Apr24 revised Are “Transition Books” (Spivak/Apostol/Courant) really necessary? edited tags Apr24 revised General term of the sequence$2, 7, 16, 30, 50, 77, 112, 156$added 482 characters in body Apr24 revised General term of the sequence$2, 7, 16, 30, 50, 77, 112, 156\$ added 3 characters in body; edited title