Graphth

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203 Answers

newest activity votes
21
Why is -10 smaller than -100?
20
Math and mental fatigue
15
Why is the last digit of $n^5$ equal to the last digit of $n$?
11
Why does the series $\sum_{n=1}^\infty\frac{(-1)^{n-1}n!}{10^n}$ not converge?
11
Number of consecutive zeros at the end of $11^{100} - 1$.
11
Is Sage on the same level as Mathematica or Matlab for graph theory and graph vizualization?
11
Deleting any digit yields a prime… is there a name for this?
10
Show that the set of all finite subsets of $\mathbb{N}$ is countable.
10
Theorems with an extraordinary exception or a small number of sporadic exceptions
10
Why $ac=b^2$ forces $a,c$ to be squares if $a,c$ are coprime?
10
Can I use my powers for good?
10
Books to study for Math GRE, self-study, have some time.
9
Why is $\int^\infty_{-\infty} \frac{x}{x^2+1} dx$ not zero?
8
Solve $e^x+x=1$
8
$\lim_{n\to\infty}\frac{a_{n-1}}{a_{n}}$
8
Is the function $y=\ln x^2$ the same as $y=2\ln |x|$?
8
General Introduction to Functional and other Mathematic Notations
7
How to show that $f(x)=x^2$ is continuous at $x=1$?
7
What exactly is going on when we're finding a limit?
7
$\frac{2x + 10}{2} - x = 5$: How do I show that all kinds numbers satisfy this equation?
7
Why is the expected value $E(X^2) \neq E(X)^2$?
6
Too old to start math
6
Determine $\lim_{x \to 0}{\frac{x-\sin{x}}{x^3}}=\frac{1}{6}$, without L'Hospital or Taylor
6
Expressing $\sin^4x-\sin^6x$ in another way
6
Absolute maximum value of $\sin^2(x)-\sin(x)$ in $[0,\frac{3\pi}{2}]$
6
Rules of Division
5
how to tell whether x and y are independent or not
5
how to get from $\frac{x}{x+1}\;$ to $\;1 - \frac{1}{x+1}$
5
Proof that this integral is independent of $a$
5
Self-Studying Abstract Algebra; Aye or Nay?
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