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Top Questions
56
votes
How is the derivative truly, literally the “best linear approximation” near a point?
calculus
derivatives
approximation
asked May 13 '16 at 20:58
math.stackexchange.com
48
votes
What are “instantaneous” rates of change, really?
calculus
derivatives
soft-question
asked Jun 11 '15 at 19:02
math.stackexchange.com
28
votes
I think I can complete the square of any quadratic, is it true? (Any reason to ever use Quad. Formula?)
algebra-precalculus
quadratics
completing-the-square
asked May 31 '15 at 21:22
math.stackexchange.com
23
votes
Fewest steps to reach $200$ from $1$ using only $+1$ and $×2$
combinatorics
algebra-precalculus
contest-math
asked Mar 17 '19 at 19:23
math.stackexchange.com
21
votes
Where does the constant increase by 2 of differences between integer square values come from?
algebra-precalculus
elementary-number-theory
intuition
asked May 7 '15 at 16:32
math.stackexchange.com
18
votes
Why do all parabolas have an axis of symmetry?
algebra-precalculus
algebraic-geometry
asked May 30 '15 at 15:09
math.stackexchange.com
17
votes
Printing a list as “a, b, c.” using Python
python
performance
formatting
asked Aug 28 '19 at 2:00
codereview.stackexchange.com
16
votes
Pandas: Subtract row mean from each element in row
python
pandas
dataframes
asked Sep 28 '14 at 3:24
stackoverflow.com
15
votes
Return first duplicate
python
algorithm
array
asked Oct 13 '20 at 23:32
codereview.stackexchange.com
13
votes
Array manipulation: add a value to each of the array elements between two given indices
python
algorithm
programming-challenge
array
asked Oct 21 '20 at 23:53
codereview.stackexchange.com
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Top Answers
21
Why do academics frequently write very short email replies?
academia.stackexchange.com
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