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Oct
22
answered Sum of $1+2+4+8+…$
Oct
8
asked Limit $\lim_{x\to\infty} \frac {a_nx^n+a_{n-1}x^{n-1}+\cdots+a_0}{{b_nx^n+b_{n-1}x^{n-1}+\cdots+b_0}}$
Mar
17
asked For which $\alpha$ does the series $\sum_{n = 1}^{\infty}\big(2^{n^{-\alpha}}\!\! - \!1\big)$ converge?
Mar
17
asked Largest possible 2D combination not containing 2 common rectangles
Mar
9
answered Determining total number of tickets sold
Feb
21
answered $\frac {\operatorname d\!y}{\operatorname d\!x}$ for $\sqrt{xy}=1$
Jan
20
answered How to work out an integral with algebra.
Dec
29
answered Mathematicians don't quit, they fade away
Dec
29
answered Evaluating $\lim_{n\to \infty } \, \left(\sum _{k=1}^{\infty } \frac{1}{n}\right)$
Dec
25
answered Can We Represent Every Real Number Using Only Finite Memory?
Dec
24
asked Solving 5th degree or higher equations
Dec
19
answered Which function whose graph looks like the space time around a black hole?
Dec
18
asked How can triangle inequlity be extended to become tetrahedron inequlity?
Dec
3
asked Is $f(x)>g(x) \iff \frac {\operatorname d}{\operatorname d x }f(x)>\frac {\operatorname d}{\operatorname d x }g(x)$?
Dec
3
answered Simplify $2^{(n-1)} + 2^{(n-2)} + … + 2 + 1$
Dec
1
answered Is every proof for natural numbers equivalent to an induction proof?
Nov
27
answered The derivative of $\tanh x$
Nov
22
answered Does L'Hôpital's work the other way?
Nov
22
answered Indefinite integral of $\sin(x)$ without using the derivative of $\cos(x)$
Nov
21
answered $\sum_{n=2}^\infty \frac{1}{(\ln\, n)^2}$ c0nvergence