User Anvit

33 votes

Accepted

Are all quadratics factorable into a product of two binomials?

answered Nov 21, 2017 at 15:48

5 votes

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Covariance Identity: $\operatorname{Cov}(X,Y) = E(\operatorname{Cov}(X,Y\mid Z)) + \operatorname{Cov}(E(X\mid Z),E(Y\mid Z))$

answered Jan 26, 2019 at 16:51

4 votes

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Is it safe to say the following about the odd prime numbers other than 5.

answered Jun 1, 2020 at 11:38

3 votes

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If $||x|| < \sup\{||x_i||\}$ and $||x|| > \inf\{||x_i||\}$, then is $x \in \{x_i\}$?

answered May 28, 2019 at 4:43

3 votes

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Dice with the same sum at least 5 times

answered Jun 18, 2019 at 11:14

3 votes

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Is the function $f(g(x))$ convex if $f(x)$ is linear and $g(x)$ is convex?

answered Feb 10, 2019 at 9:01

3 votes

Distribution of Similar objects to different persons

answered Dec 23, 2017 at 14:38

2 votes

Probability of all 3 cards drawn being the same number

answered Dec 23, 2017 at 14:59

2 votes

Accepted

Simplification of special quartic polynomial

answered Apr 12, 2018 at 11:39

2 votes

Series Expansion of $\sqrt{\frac{1}{x}-1}$

answered Apr 20, 2018 at 12:47

2 votes

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$I(x_1, x_2, . . . , x_6) = 2x_1 + 4x_2 + 6x_3 + 8x_4 + 10x_5 + 12x_6 \mod 10$ is the invariant

answered May 7, 2018 at 7:24

2 votes

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Percentage Arithmatic

answered Jun 10, 2018 at 11:56

2 votes

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In how many ways we can collect a total of $20$ dollars

answered Jun 11, 2018 at 6:15

2 votes

How Do I Get All The Possible Combinations Of Five Sets Of Data?

answered Jun 28, 2018 at 13:47

2 votes

Probability with restriction

answered Nov 20, 2018 at 10:26

2 votes

Accepted

Request for assistance on finishing the proof that $\lim_{n\to\infty}n x_n = 0$ given some initial conditions.

answered Dec 27, 2018 at 13:18

2 votes

Why is $U ^tU $ an orthogonal projection on $\operatorname{Im}(U)$?

answered Feb 13, 2019 at 17:44

2 votes

Accepted

Compute $ \lceil{log_2(n)}\rceil $ through basic arithmetic operation

answered Apr 15, 2019 at 11:54

1 vote

Evaluate $\sum_{k=1}^n\log(x ^ {\frac{k}{2k+1}} )$

answered Feb 17, 2019 at 5:31

1 vote

Showing that two tuples are equal

answered Jun 11, 2020 at 11:34

1 vote

$\sin(x) + \cos(x) = \sqrt{2}\cdot \sin(x+\pi/4)$ but what is it as cosine?

answered Apr 28, 2019 at 10:53

1 vote

Accepted

Even number not the sum of two base $2$ palindromes

answered Dec 27, 2018 at 17:45

1 vote

Accepted

$A\in M_{m\times n}(k)$ is one one iff row rank is $n$

answered Oct 17, 2018 at 6:04

1 vote

Accepted

Finding a random position in the unit circle

answered Dec 17, 2018 at 10:41

1 vote

How is this algebraic expression turned into positive?

answered Jun 10, 2018 at 12:56

1 vote

Six digit number probability

answered Jun 10, 2018 at 13:24

1 vote

Find the maximum value of $f(x,y)=x^2+y^2$ in the region bounded by $y=\frac x2,y=-\frac x2$ and $x=y^2+1$,including the boundary lines

answered May 2, 2018 at 15:28

1 vote

Accepted

gambling strategy diagram

answered Apr 21, 2018 at 8:21

1 vote

Accepted

Using integral to find the area under a portion of a semicircle

answered Apr 12, 2018 at 12:11

1 vote

Accepted

Probability of an "at least" Question

answered Apr 19, 2018 at 15:21

Stack Exchange Network

49 Answers

Are all quadratics factorable into a product of two binomials?

Covariance Identity: $\operatorname{Cov}(X,Y) = E(\operatorname{Cov}(X,Y\mid Z)) + \operatorname{Cov}(E(X\mid Z),E(Y\mid Z))$

Is it safe to say the following about the odd prime numbers other than 5.

If $||x|| < \sup\{||x_i||\}$ and $||x|| > \inf\{||x_i||\}$, then is $x \in \{x_i\}$?

Dice with the same sum at least 5 times

Is the function $f(g(x))$ convex if $f(x)$ is linear and $g(x)$ is convex?

Distribution of Similar objects to different persons

Probability of all 3 cards drawn being the same number

Simplification of special quartic polynomial

Series Expansion of $\sqrt{\frac{1}{x}-1}$

$I(x_1, x_2, . . . , x_6) = 2x_1 + 4x_2 + 6x_3 + 8x_4 + 10x_5 + 12x_6 \mod 10$ is the invariant

Percentage Arithmatic

In how many ways we can collect a total of $20$ dollars

How Do I Get All The Possible Combinations Of Five Sets Of Data?

Probability with restriction

Request for assistance on finishing the proof that $\lim_{n\to\infty}n x_n = 0$ given some initial conditions.

Why is $U ^tU $ an orthogonal projection on $\operatorname{Im}(U)$?

Compute $ \lceil{log_2(n)}\rceil $ through basic arithmetic operation

Evaluate $\sum_{k=1}^n\log(x ^ {\frac{k}{2k+1}} )$

Showing that two tuples are equal

$\sin(x) + \cos(x) = \sqrt{2}\cdot \sin(x+\pi/4)$ but what is it as cosine?

Even number not the sum of two base $2$ palindromes

$A\in M_{m\times n}(k)$ is one one iff row rank is $n$

Finding a random position in the unit circle

How is this algebraic expression turned into positive?

Six digit number probability

Find the maximum value of $f(x,y)=x^2+y^2$ in the region bounded by $y=\frac x2,y=-\frac x2$ and $x=y^2+1$,including the boundary lines

gambling strategy diagram

Using integral to find the area under a portion of a semicircle

Probability of an "at least" Question