Skip to main content
David G's user avatar
David G's user avatar
David G's user avatar
David G
  • Member for 12 years, 9 months
  • Last seen more than a week ago
225 votes
10 answers
13k views

What does $2^x$ really mean when $x$ is not an integer?

33 votes
2 answers
43k views

What does $\log^{2}{x}$ mean?

13 votes
1 answer
22k views

Why is $i^i$ real? [duplicate]

10 votes
2 answers
475 views

Is there another representation for $x^x$

8 votes
4 answers
11k views

Inverse of the natural log function $y =\ln x$

8 votes
6 answers
6k views

What does the exclamation mark do?

6 votes
2 answers
15k views

What are functions used for?

5 votes
3 answers
2k views

What does | mean?

4 votes
1 answer
143 views

How do I refer to a certain element in a set?

4 votes
2 answers
7k views

How do calculators handle $\pi$?

3 votes
2 answers
387 views

Ex${{{}}}$tremely Tricky Probability Question?

3 votes
4 answers
356 views

Is there any way to find out $x! = n$ by hand?

3 votes
1 answer
631 views

What does $\sum$ mean without a starting index and limit?

3 votes
2 answers
31k views

Why does Wolfram Alpha handle $\log$ and $\ln$ the same?

3 votes
2 answers
183 views

What does a particular part of this equation mean? [duplicate]

3 votes
3 answers
285 views

If Bob makes $\$9.00$ an hour, how long does it take for him to make $\$1.00$?

3 votes
1 answer
52 views

Recurrence relation of the following sequence?

3 votes
4 answers
81 views

A summation that starts from $-\infty$

2 votes
2 answers
46 views

Incongruity between summation and proof result

2 votes
2 answers
8k views

Reversing the order of summation in $\sum_{i=1}^{n} i$

2 votes
2 answers
95 views

How does this simplification work?

2 votes
2 answers
83 views

Help with proof by induction

2 votes
2 answers
138 views

How do I approach a question like this?

2 votes
4 answers
319 views

How to find the limit of an uncountably infinite expression?

2 votes
1 answer
1k views

Question about significant figures

2 votes
3 answers
250 views

What makes $0!$ equal to 1? [duplicate]

2 votes
2 answers
12k views

11th grade level exponential growth problem?

2 votes
4 answers
4k views

What is the summation operator used for in Mathematics?

2 votes
6 answers
2k views

Summing numbers which increase by a fixed amount (arithmetic progression)

2 votes
1 answer
378 views

When my teacher gives me a question involving summation notation, do they expect us to calculate it by hand?