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Apr
17
reviewed Approve Is $xy y' = \sqrt{y^2 + 1}$ separable or non-separable?
Apr
13
reviewed Approve Show that if $\gcd(a,pq)=1$ and $g=\gcd (p-1, q-1)$ then $a^{\frac{(p-1)(q-1)}{g}}\equiv 1 \pmod {pq}$.
Feb
14
reviewed Leave Closed How can I calculate missing values from a table listing of areas and prices?
Feb
14
reviewed Leave Closed The appearance of complex numbers when factoring quadratics
Feb
14
reviewed Leave Closed What is wrong with this infinite sum
Nov
5
reviewed Reject Divisibility criteria of 24. Why is this?
Oct
19
reviewed Reviewed Finding the height of a balloon given two observers on the ground at a fixed distance apart
Oct
19
reviewed Leave Closed Combinatorics: how do you apply multiset theory to solve problem about items in a bag?
Oct
19
reviewed Leave Open How to prove that the following system of equations has only one solution?
Oct
19
reviewed Close The fundamental group of $\mathbb S^2$ attached with a diameter?
Oct
19
reviewed Close Relation between Fundamental theorem of calculus and the definition of the derivative
Oct
19
reviewed Leave Open Circuits and Trees
Oct
19
reviewed Close Number of rational roots of a univariate polynomial
Oct
19
reviewed Leave Open Integral Involving Gaussian Q function and exponential
Oct
19
reviewed Close $\frac{1}{e}=\lim_{n\to \infty}(1-\frac{1}{n+1})^{n+1}$ How?
Oct
19
reviewed Leave Open Find $x$ which satisfies the following equation
Oct
19
reviewed Leave Open show that $f(x)=\frac{1}{\sqrt{5} -2\sin x}$, is bounded on the interval $0\leq x \leq 2\pi$?
Oct
19
reviewed Close Establishing Triangle Inequality of a particular norm
Oct
19
reviewed Leave Open What does it mean for the determinant of $A^T A$ to be equal to zero?
Oct
19
reviewed Close simple logic to use only one operator to construct a function