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Jul
30
reviewed No Action Needed Find all solutions to the equation. $7 \sin^2x - 14 \sin x + 2 = -5$
Jul
21
reviewed Close Direct proof for convexity of $e^x$
Jul
17
reviewed Looks OK map the UHP to an equilateral triangle
Jul
17
reviewed Looks OK chain rule or product rule
Jul
14
reviewed Close Which values, when placed in the box, would result in a system of equations with no solution? Check all that apply.
Jul
11
reviewed Close How to prove for any point $P$ inside an equilateral triangle $ABC$, $PA+PB > PC$
Jul
9
reviewed Looks OK Real part of $\frac{1-e^{(n+1)i\theta}}{1-e^{i\theta}}$
Jul
8
reviewed Looks OK Can someone please check my work?: $\cos^2(x)=1-\sin(x)$
Jul
8
reviewed Close trigonometry mountain elevation problem
Jul
7
reviewed Reviewed How many different three-digit house numbers could be made?
Jul
7
reviewed No Action Needed Discrete matematics, using pigeonhole principle
Jul
7
reviewed Close What is value of k in next hermonic serie?
Jul
6
reviewed Leave Open local inverse functions
Jul
6
reviewed Looks OK How to compute Lipschitz Constant for multivariate function $f(x,y)=1-xy$?
Jun
28
reviewed Approve Inverse Laplace Transform using Hetnarski's Algorithm
Jun
25
comment How to evaluate this integral?
Since we let $R\to\infty$ eventually, we can just consider $R$ sufficiently large so that $R^2-4>0$.
Jun
13
answered Prove or disprove there is an entire function so that for every $z \in \mathbb C$, $|f(z)|=x^2+y^2+1$
Jun
13
reviewed Approve Matrix relation
Jun
11
comment If $0<f'\left(x\right)<f\left(x\right)$ and $f\left(0\right)=e$, then $f\left(2e\right)<e^{8}$
Thanks for pointing out. I edited the answer.
Jun
11
revised If $0<f'\left(x\right)<f\left(x\right)$ and $f\left(0\right)=e$, then $f\left(2e\right)<e^{8}$
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