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MathAdam
  • Member for 6 years, 11 months
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28 votes
2 answers
814 views

Is this a valid proof that the harmonic series diverges?

10 votes
4 answers
2k views

Can a function have a derivative where it has no value?

8 votes
4 answers
3k views

Is there a relationship between vector spaces and fields/rings/groups?

8 votes
3 answers
1k views

Does $\lim_{x\to 0^+} \sqrt{x}$ exist or not?

7 votes
2 answers
261 views

Is this a sound demonstration of Euler's identity?

6 votes
1 answer
158 views

How do I translate $ [(P \Rightarrow Q) \land (Q \Rightarrow T)] \Rightarrow T$ into English?

5 votes
2 answers
156 views

Please help me to remove Feynman's $\log_{10}$ from my eye.

5 votes
0 answers
625 views

Does the arithmetic derivative have a geometric interpretation

5 votes
3 answers
21k views

If a function is undefined at a point, is it also discontinuous at that point?

4 votes
2 answers
127 views

How do I demonstrate the geometric meaning of a $2\times2$ matrix?

4 votes
1 answer
3k views

Why does Desmos give a different exponential regression than my TI 84 and my Calculus text?

4 votes
2 answers
659 views

Can we solve this without cubic formula?

4 votes
1 answer
118 views

Does this infinite nested radical show that $\pi$ is irrational?

3 votes
4 answers
175 views

Is this approach to the limit solution kosher?$ \lim_{n\rightarrow\infty}\frac{(n!)^{\tfrac{1}{n}}}{n}=\frac{1}{e}$

3 votes
0 answers
53 views

How to write a complete solution to $i=\cos x$?

3 votes
1 answer
51 views

Is $\sqrt{2+\sqrt{5}}$ included in the extension field $\mathbb{Q}(\sqrt5)$?

3 votes
4 answers
619 views

Does a Dedekind cut define a real number into existence?

3 votes
1 answer
74 views

How does $y=\frac{2x+2}{x+2}$ contribute to demonstrating the Dedekind cut for $\sqrt{2}$?

3 votes
3 answers
163 views

A right triangle has leg $n$, hypotenuse $2n+6$, and perimeter $60$. Find the lengths of all sides.

3 votes
7 answers
1k views

Is the $\epsilon-\delta$ definition of a limit useful for either calculating or proving limits?

2 votes
3 answers
124 views

Is there a general solution to $a^x + b^x =c^x$ for $x\in\mathbb{R}$?

2 votes
3 answers
108 views

Is $\emptyset$ a set element?

2 votes
5 answers
51 views

Is there anything in the proof for $\frac{a}{1-r}$ to show that it won't work for $|r|\gt1$ when summing an infinite geometric series?

2 votes
3 answers
123 views

Is there a function that maps each element of $\mathbb{Q}$ between 0 and 1 to $\mathbb{N}$?

2 votes
2 answers
83 views

Does the $0$ solution for $\sqrt{x\sqrt{x\sqrt{x\sqrt{x\sqrt{x...}}}}}$ hold any meaning?

1 vote
2 answers
142 views

Fibonacci general term: How do I mend this broken derivation?

1 vote
2 answers
337 views

What is the significance of the number $0.739085133$ (the solution of $x = \cos(x)$)?

1 vote
0 answers
59 views

Is there any way to rescue this trig identity proof?

1 vote
2 answers
65 views

What (if any) system of equations would solve this problem?

1 vote
1 answer
56 views

How to solve this vector problem involving more than one unknown?