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Dec
25
answered Measure theory for self study.
Dec
24
answered On a recursive sequence exercise.
Nov
16
answered Is the function determinant $A \rightarrow \det(A)$ a non-convex fuction?
Nov
12
answered Is $\sqrt{x}$ uniformly continuous on $(0,1)$?
Nov
12
answered Limit of $\frac{1-\cos(x)(\cos(2x))^2}{x^2}$ when $x\to0$ without L'Hôpital's rule?
Nov
11
answered Value of the limit without (or with, but giving rigorous arguments) using the Taylor expansion of sin
Nov
10
answered Is there a name for $2^n$ in combinatorics?
Nov
10
answered How to show that the quadratic equation has solutions with real part negative?
Nov
10
answered How do you build a square from this figure?
Nov
6
answered How many ways can $p+q$ people sit around $2$ circular tables - of sizes $p,q$?
Nov
4
answered Solving a differential equation involving a trigonometric function
Oct
28
answered How to calculate $\int_0^{\pi/2} \sqrt[3]{\mathrm{cotg}\; x} \;\mathrm{d}x$
Oct
28
answered Have i understood Fermat little theorem and Euler's theorem correctly?
Oct
27
answered Two numbers equality formula
Oct
25
answered Why is it valid to find $C$ in $ \int f(x)dx=g(x)+C$ by plugging in $x=0$?
Oct
25
answered Determine if $\sum_{n=2}^{\infty} \frac{(-1)^n}{n+(-1)^n} $converges or diverges
Oct
10
answered Middle cancellation in agroup
Oct
10
answered Modulus Equations
Oct
8
answered When solving for eigenvector, when do you have to check every equation?
Oct
8
answered The number of solutions of the equation $4\sin^2x+\tan^2x+\cot^2x+\csc^2x=6$ in $[0,2\pi]$