User gt6989b - Mathematics Stack Exchange

22 votes

Accepted

What is the difference between codomain and range?

answered Aug 9, 2019 at 3:44

19 votes

Accepted

Factoring the quintic polynomial $x^5+4x^3+x^2+4=0$

answered Feb 18, 2014 at 17:27

19 votes

LaTeX/TeX Vs. Mathematica for Typesetting

answered Feb 20, 2014 at 22:58

15 votes

Prove that $2018^{2019}> 2019^{2018}$ without induction, without Newton's binomial formula and without Calculus.

answered Feb 25, 2019 at 20:46

13 votes

Accepted

Adding Absolute value to a complex number: $ z+| z|=2+8i$

answered Mar 5, 2018 at 2:45

13 votes

Accepted

Can an indefinite integral have multiple answers? (Besides the ' + C')

answered Mar 4, 2013 at 22:22

13 votes

What does strength refer to in mathematics?

answered Feb 29, 2016 at 17:14

12 votes

Accepted

Characteristic functions of Poisson and normal distribution

answered Oct 20, 2015 at 20:40

12 votes

Accepted

find all the values of a and b so that the system has a) no solution b) 1 solution c) exactly 3 solutions and 4) infinitely many solutions

answered Nov 14, 2013 at 20:07

11 votes

Accepted

Showing that $a = 2^{1264504 }- 1$ is not prime

answered Aug 10, 2017 at 0:38

10 votes

Accepted

Prove that $9\mid (4^n+15n-1)$ for all $n\in\mathbb N$

answered Jul 15, 2013 at 14:50

10 votes

Accepted

Multiplying two summations together exactly.

answered Jun 5, 2013 at 14:04

10 votes

Accepted

What does "$\mathbb{1}$" mean in this document?

answered May 18, 2015 at 15:33

10 votes

Accepted

Way to compare three numbers with an algorithm.

answered May 20, 2015 at 14:58

10 votes

Can I apply L'Hôpital to $\lim_{x \to \infty} \frac{x+\ln x}{x-\ln x}$?

answered Mar 28, 2017 at 17:52

10 votes

Linear Transformation

answered Apr 3, 2017 at 20:46

10 votes

2021 AMC 10 A Problem #22

answered Feb 18, 2021 at 15:23

9 votes

The notion of "infinitely differentiable"

answered May 12, 2016 at 21:31

9 votes

Accepted

$33=\left\{a^3+b^3+c^3 \mid (a, b, c) \in \mathbb{Z}\right\}$

answered Jul 19, 2017 at 14:59

9 votes

Convergence or divergence of a series given divergent series

answered Jan 17, 2019 at 21:59

8 votes

Accepted

What is the integral of $e^{x\cos\theta + y\cos\theta}$

answered Sep 6, 2018 at 14:11

8 votes

If $f(x^3 + x) = x^3 + x^2 + 1$, then what is $f'(2)$?

answered Dec 14, 2015 at 18:44

8 votes

Accepted

Is $\frac {\Delta y}{\Delta x}=\frac {dy}{dx}$?

answered May 17, 2017 at 15:53

8 votes

Accepted

What is the sum of the first $17$ terms of an arithmetic sequence if $a_9=35$?

answered Jun 14, 2016 at 16:59

8 votes

Accepted

Expectation of stochastic differential equation

answered Feb 21, 2014 at 21:55

8 votes

Median $\neq$ expectation

answered Mar 20, 2014 at 14:33

8 votes

Accepted

How to compute the $n^{\textrm{th}}$ power of a matrix?

answered Apr 1, 2014 at 18:46

8 votes

Accepted

Domain of the composition of functions

answered May 27, 2021 at 19:50

8 votes

Accepted

Negation of "Either X is true, or Y is true, but not both"

answered Jun 3, 2020 at 22:14

7 votes

Probability of having zero determinant

answered Oct 31, 2012 at 15:59

Stack Exchange Network

2,804 Answers

What is the difference between codomain and range?

Factoring the quintic polynomial $x^5+4x^3+x^2+4=0$

LaTeX/TeX Vs. Mathematica for Typesetting

Prove that $2018^{2019}> 2019^{2018}$ without induction, without Newton's binomial formula and without Calculus.

Adding Absolute value to a complex number: $ z+| z|=2+8i$

Can an indefinite integral have multiple answers? (Besides the ' + C')

What does strength refer to in mathematics?

Characteristic functions of Poisson and normal distribution

find all the values of a and b so that the system has a) no solution b) 1 solution c) exactly 3 solutions and 4) infinitely many solutions

Showing that $a = 2^{1264504 }- 1$ is not prime

Prove that $9\mid (4^n+15n-1)$ for all $n\in\mathbb N$

Multiplying two summations together exactly.

What does "$\mathbb{1}$" mean in this document?

Way to compare three numbers with an algorithm.

Can I apply L'Hôpital to $\lim_{x \to \infty} \frac{x+\ln x}{x-\ln x}$?

Linear Transformation

2021 AMC 10 A Problem #22

The notion of "infinitely differentiable"

$33=\left\{a^3+b^3+c^3 \mid (a, b, c) \in \mathbb{Z}\right\}$

Convergence or divergence of a series given divergent series

What is the integral of $e^{x\cos\theta + y\cos\theta}$

If $f(x^3 + x) = x^3 + x^2 + 1$, then what is $f'(2)$?

Is $\frac {\Delta y}{\Delta x}=\frac {dy}{dx}$?

What is the sum of the first $17$ terms of an arithmetic sequence if $a_9=35$?

Expectation of stochastic differential equation

Median $\neq$ expectation

How to compute the $n^{\textrm{th}}$ power of a matrix?

Domain of the composition of functions

Negation of "Either X is true, or Y is true, but not both"

Probability of having zero determinant