user avatar
user avatar
user avatar
jgsmath
  • Member for 5 years
  • Last seen this week
16 votes

If $f(x)=\frac{1}{x^2+x+1}$, how to find $f^{(36)} (0)$?

7 votes

Cauchy-Riemann equations in polar form.

6 votes

Prove that a circle exists for which at least $n \in \mathbb{N}$ points have integer coordinates

3 votes

How do you evaluate high powers in modulo expressions?

3 votes

Why is the inradius of any triangle at most half its circumradius?

3 votes

Does $\partial_t u(x,t) - \partial_x u(x,t) = 0$ have a non-trivial solution?

3 votes

Simplify the expression: $(2x+1)×\left(x^2+(x+1)^2 \right)×\left( (x^4+(x+1)^4) \right)×...×\left(x^{64}+(x+1)^{64}\right)$

3 votes

Change of variables and circular solutions

3 votes
Accepted

Evaluation of $I=\iint_R e^{-(x^2+y^2)} \,dx\,dy$ by change of variable

2 votes

Show $(\ln(x))^a<\sqrt x$ for any $a>1$

2 votes

Stuck on trying to even start proving $2\mid (n^4-3)$ if and only if $4\mid (n^2 + 3)$

2 votes

How do I solve $\int_0^\infty \frac{x^2}{x^4+1} \, dx$?

2 votes

Why is it true that $\lim_{x\to 0}\frac1x\int^x_0e^{t^2} dt=1$?

1 vote

Trigonometric simple equation

1 vote

$n>m$ so $w_1,...,w_n$ are linearly dependent theorem doubts

1 vote
Accepted

Triple Integral In a Sphere Outside of a Cone

1 vote
Accepted

Matrix equation optimization

1 vote

Prove that $\cos(2a) + \cos(2b) + \cos(2c) \geq -\frac{3}{2}$ for angles of a triangle

1 vote

Calculating probability for forming a triangle

1 vote

The validity of normalization in homogeneous inequalities?

1 vote

What is the second derivative of $f^{-1}(g(x))$?

1 vote
Accepted

Prove that $\frac{\sqrt{N}}{(\frac{N(N - 1)}{2} + 1)^2} \le 1$ for $N \ge 2$.

1 vote

Dilemma in a problem on GP

0 votes

full QR decomposition- orthonormal basis for the null space of A^{T}

0 votes
Accepted

I need help on right triangles

0 votes

Derivative of $H(x)=[f(x)]^{x^2+1}-[\cos(2x)]^{g(x)}$ for differentiable, positive $f(x), g(x)$

0 votes

Find the point of intersection between a line segment $AC$ and a perpendicular line going through a point $B$ not on $AC$

0 votes

Proof of $\lim_{x \to \infty}\tan x/x$ does not exist

0 votes

Show that the arithmetic mean is less or equal than the quadratic mean

0 votes

What is the characteristics of the vector $\vec a ,\vec b , \vec c$ and $\vec d$?