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439 Answers

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123
$\epsilon$-$\delta$ proof that $\lim\limits_{x \to 1} \frac{1}{x} = 1$.
Jun 13 '13 at 3:37
47
What is the difference between “expectation”, “variance” for statistics versus probability textbooks?
Dec 23 '20 at 5:18
36
A proof of the product rule using the single variable chain rule?
Aug 2 '18 at 19:58
30
How to algebraically solve $\frac{1}{x} < 5$ inequality to obtain two solutions?
Dec 26 '17 at 19:19
14
Probability of the union of $3$ events?
Feb 9 '14 at 6:58
13
Gaining Mathematical Maturity
May 27 '16 at 17:07
12
Finding the density for $\min\{X, Y\}$
Jun 7 '16 at 16:43
11
MLE for Uniform $(0,\theta)$
Oct 4 '18 at 17:04
11
Transpose matrix and inner product
Jun 18 '18 at 14:57
10
Where does the inequality: $|f(x)-f(y)|\leq|f(x)-f_n(x)|+|f_n(x)-f_n(y)|+|f_n(y)-f(y)|$ come from?
Dec 19 '15 at 2:10
9
Derivative of the sine function when the argument is measured in degrees
Jan 18 '18 at 19:16
9
Is “Linear Algebra Done Right 3rd edition” good for a beginner?
Jan 17 '16 at 15:39
8
Generalization of Bayes' Theorem
Nov 1 '14 at 6:09
7
Letting $\epsilon = \frac{\epsilon}{2}$
Jan 10 '19 at 17:55
7
Expectation and variance of $Y=\max(X_1,\ldots,X_n)$, where $X$ is uniformly distributed.
Sep 4 '18 at 20:07
7
Find $F'(x)$ if $F(x) = \displaystyle \int_{0}^x xf(t)dt$.
May 16 '16 at 16:00
7
Stuck on basic limit problem: $\lim_{x \to 0} \frac{\sin(\tan x)}{\sin x}$
Mar 22 '16 at 22:27
7
What does strength refer to in mathematics?
Feb 29 '16 at 17:24
7
Calculate: $\lim_{x\to 0} \frac{f(x^2)-f(0)}{\sin^2(x)}$.
Jan 17 '16 at 15:10
7
Assumption of a Random error term in a regression
Dec 4 '14 at 19:26
6
How to differentiate product of vectors (that gives scalar) by vector?
May 27 '16 at 15:54
6
How do we prove $|\cos x-\cos y|\le|x-y|$ for all $x,y\in\mathbb{R}$?
Jun 10 '17 at 0:40
6
Limit problem with an exponential function without L'Hopital
Dec 29 '15 at 20:09
6
How can I plot this function that has a fraction that has an absolute value in the denominator?
Jun 14 '15 at 19:57
6
What objects can belong in a group?
Dec 27 '14 at 5:29
6
Help using Fundemental Theorem of Calculus for the first time
Jun 25 '14 at 13:18
5
How to simplify absolute value expressions such as: $|x+1|+|x-1|$ algebraically?
Dec 22 '20 at 6:13
5
Maximum and minimum values of probabilities
Aug 7 '18 at 11:54
5
Derive unbiased estimator for $\theta$ when $X_i\sim f(x\mid\theta)=\frac{2x}{\theta^2}\mathbb{1}_{(0,\theta)}(x)$
Jan 18 '18 at 12:45
5
Differentiation with respect to a matrix (residual sum of squares)?
Feb 28 '17 at 19:29
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