User quapka

11 votes

A Poster About Prime Numbers

answered Apr 21, 2014 at 16:20

7 votes

Is university math all about proofs?

answered May 24, 2015 at 13:33

5 votes

Accepted

$\binom{n}{r}$ versus $^n\mathrm{C}_r$ : which notation is more used?

answered May 12, 2015 at 17:07

5 votes

Accepted

Even, Odd, or Neither

answered Dec 12, 2013 at 19:28

3 votes

Limit of a quotient with denominator approaching zero: $\lim_{x\to -1}\frac{\sqrt {x ^ 2 + 8} - 3}{x + 1} $

answered Feb 2, 2014 at 9:32

3 votes

Prove the matrix satisfies the equation $A^2 -4A-5I=0$

answered Apr 20, 2014 at 19:33

3 votes

Accepted

Use Fermat's little theorem to find the roots of $2x^{219}+3x^{74}+2x^{57}+3x^{44}$ in $\mathbb{Z}_5$

answered Nov 26, 2015 at 21:56

3 votes

Accepted

The center of a group $G$ is a subgroup of $G$

answered May 24, 2015 at 9:46

2 votes

Accepted

Understanding a symbolic addition question

answered Dec 19, 2015 at 18:39

2 votes

Accepted

Write in Terms of sine and cosine and simplify

answered Nov 17, 2014 at 10:44

2 votes

Find the length of $y=x^2$ from $x=0$ to $x=1$

answered Apr 20, 2014 at 10:03

2 votes

Simplify the surd expression.

answered Jan 31, 2014 at 18:42

2 votes

LCM of First N Natural Numbers

answered Feb 1, 2014 at 19:23

2 votes

solving system of 2 equations

answered Dec 11, 2013 at 9:29

1 vote

Finding vector perpendicular to R3 plane

answered Dec 2, 2013 at 23:43

1 vote

$ST$ and $T$ are invertible. Prove that $S$ is invertible?

answered Dec 15, 2013 at 12:56

1 vote

Accepted

Complex Numbers - Polar Form/Algebraic Form

answered Feb 3, 2014 at 20:53

1 vote

Computing coefficient of $x^n$

answered Apr 21, 2014 at 14:50

1 vote

Need “Is the point in the pie?”

answered Jun 11, 2014 at 7:21

1 vote

Integral $\int_{0}^{1}\frac{\sin{x}}{x}\operatorname d\!x$

answered Feb 4, 2014 at 10:02

1 vote

If $(a,c)=1$ and $(b,c)=1$, prove $(ab,c)=1$.

answered Nov 23, 2014 at 19:47

1 vote

GCD of two polynomials

answered Nov 23, 2014 at 20:21

1 vote

Is there anything to prove in this corollary?

answered May 12, 2015 at 19:54

1 vote

Accepted

General solution of $(x^2-y^2)dx + (3xy)dy = 0$

answered May 19, 2015 at 22:52

1 vote

Accepted

Differentiation - AS Level Maths (Edexcel Specification)

answered Dec 13, 2015 at 21:06

1 vote

Let $A = \{2,3,4\}$ and $B = \{a,b\}$. List elements of $A\times B$.

answered Nov 22, 2015 at 13:23

1 vote

Why do vectors have arrowheads at the "endpoint"?

answered May 9, 2015 at 22:13

0 votes

Showing that a function is surjective (onto)?

answered May 10, 2015 at 12:57

0 votes

How do I find the composition of two functions?

answered Dec 14, 2015 at 13:46

0 votes

How to go about this proof for non zero polynomials.

answered May 21, 2015 at 11:35

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38 Answers

A Poster About Prime Numbers

Is university math all about proofs?

$\binom{n}{r}$ versus $^n\mathrm{C}_r$ : which notation is more used?

Even, Odd, or Neither

Limit of a quotient with denominator approaching zero: $\lim_{x\to -1}\frac{\sqrt {x ^ 2 + 8} - 3}{x + 1} $

Prove the matrix satisfies the equation $A^2 -4A-5I=0$

Use Fermat's little theorem to find the roots of $2x^{219}+3x^{74}+2x^{57}+3x^{44}$ in $\mathbb{Z}_5$

The center of a group $G$ is a subgroup of $G$

Understanding a symbolic addition question

Write in Terms of sine and cosine and simplify

Find the length of $y=x^2$ from $x=0$ to $x=1$

Simplify the surd expression.

LCM of First N Natural Numbers

solving system of 2 equations

Finding vector perpendicular to R3 plane

$ST$ and $T$ are invertible. Prove that $S$ is invertible?

Complex Numbers - Polar Form/Algebraic Form

Computing coefficient of $x^n$

Need “Is the point in the pie?”

Integral $\int_{0}^{1}\frac{\sin{x}}{x}\operatorname d\!x$

If $(a,c)=1$ and $(b,c)=1$, prove $(ab,c)=1$.

GCD of two polynomials

Is there anything to prove in this corollary?

General solution of $(x^2-y^2)dx + (3xy)dy = 0$

Differentiation - AS Level Maths (Edexcel Specification)

Let $A = \{2,3,4\}$ and $B = \{a,b\}$. List elements of $A\times B$.

Why do vectors have arrowheads at the "endpoint"?

Showing that a function is surjective (onto)?

How do I find the composition of two functions?

How to go about this proof for non zero polynomials.