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JohnPhteven
  • Member for 11 years, 9 months
  • Last seen more than 2 years ago
39 votes
17 answers
229k views

Get the equation of a circle when given 3 points

17 votes
5 answers
5k views

What exactly is a random variable?

11 votes
2 answers
4k views

The intersections of 2 circles

8 votes
8 answers
7k views

Proof that $\sqrt{5}$ is irrational

8 votes
3 answers
21k views

A tough differential calculus problem

6 votes
2 answers
241 views

Why does the set $\{ x \in \mathbb{Q} \mid x^2 \le 5\}$ not have a greatest element?

6 votes
3 answers
4k views

What exactly are partial differential equations?

6 votes
2 answers
404 views

Is this proof, that $\sqrt{n}$ is irrational for all non-square $n \in \mathbb{N}$, correct or not?

5 votes
2 answers
8k views

Meaning of the word 'linear' in mathematics

5 votes
2 answers
1k views

Derivative of a split function

4 votes
1 answer
3k views

Binomial Distribution and Normal Distribution

4 votes
4 answers
48k views

How to get the supremum and infimum of a set

4 votes
1 answer
10k views

Null Space and Linear Independance

4 votes
2 answers
206 views

Finding the derivative of $ h(x) = \dfrac {2\sqrt{x}}{x^2+2}$

3 votes
1 answer
273 views

Root of prime numbers [duplicate]

3 votes
3 answers
556 views

What is the logic behind this answer?

3 votes
1 answer
112k views

What is a 'critical value' in statistics?

3 votes
3 answers
2k views

Find all pairs of positive whole numbers

3 votes
1 answer
1k views

Calculate the area of 2 triangles within the square

3 votes
2 answers
849 views

Why is the derivative of the arccos the negative derivative of arcsin?

2 votes
4 answers
511 views

Sum notation confusion

2 votes
2 answers
111 views

What is wrong with this solution?

2 votes
4 answers
78 views

Question regarding differentiating with $e$

2 votes
2 answers
238 views

Prove that $ST$ is antiparallel with $PQ$

2 votes
3 answers
7k views

What exactly is a $\delta$ neighborhood

2 votes
2 answers
2k views

Minimizing (and maximizing) the area of triangles

2 votes
2 answers
710 views

A vertical line in a cartesian coordinate system

2 votes
4 answers
261 views

How do you solve the system of equations $ \dfrac{p-1}{q} = \dfrac{q-1}{2p+1} = \dfrac {3}{5}$ for $p$ and $q$?

2 votes
2 answers
369 views

Find out for which values of $\lambda$ the points of the line are inside the circle

2 votes
2 answers
5k views

Find the area of a triangle using analytic geometry