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9h
reviewed Approve How to expand $x_1^3 + x_2^3$ with the parameters of quadratic equation
12h
reviewed Reject Index is multiplicative
1d
reviewed Approve on the least primitive root of a prime
1d
reviewed Reject How to prove that $k^3+3k^2+2k$ is always divisible by $3$?
Feb
5
reviewed Approve How to factor $x/(x^2+x+5)$?
Feb
5
reviewed Approve parametric equations, finding the range of t
Feb
5
reviewed Close Prove that if $f:[a,+\infty [\longrightarrow \mathbb R$ is uniformly continuous, then $\lim_{x\to +\infty }f(x)=+\infty $
Jan
15
reviewed Reopen Solve the equation $2φ(x)=x $ for $x\in\mathbb N^+.$
Jan
12
reviewed Close Given a complete graph of $n$ vertices $K_n$ (has all possible edges – one edge between pair of vertices).
Jan
8
reviewed Leave Open The number of real roots of $x\lfloor x\rfloor+187=\lfloor x^{2}\rfloor+\lfloor x\rfloor$
Jan
4
reviewed Approve To solve the following integral: $\int _0 ^{2\pi} y e^{ab\cos\left(k y\right)}\, \mathrm{d}y$
Dec
26
reviewed Approve $\int\frac{\sqrt{\ln x}}{x}\ dx$
Dec
26
reviewed Leave Open Need to find the ellipse of maximum area inscribed in a semicircle.
Dec
14
reviewed Approve How to find the characteristic number of a given integral equation?
Dec
5
reviewed Reject Which of the following function(s) has/have removable discontinuity at $x=1?$
Oct
4
reviewed Approve Linear Algebra - True or False Questions and their Concepts
Sep
25
reviewed Approve What do they want me prove?
Sep
25
reviewed Approve what does it mean… $P((x_1\in A)\cap (x_2\in (A\cap B))$?
Sep
13
reviewed Approve Find inverse of $7x^{2}-112x+448$
Sep
3
reviewed Approve Solve L'Hopitals problem