Danijel

 9 Why does $n$-time differentiation of product have the same structure as raising sum to $n$th power? 9 What does the derivative of area with respect to length signify? 7 Is $1111111111111111111111111111111111111111111111111111111$ ($55$ $1$'s) a composite number? 5 Applications of inflection points 4 Find the Taylor series of $f(x) = e ^{- 1 / x^2}$

### Reputation (1,326)

 +2 Is F countable or uncountable? +90 Does $|\mathcal P(A)|=|\mathcal P(B)|$ imply $|A|=|B|$? +10 What does the derivative of area with respect to length signify? +10 Determine p(z) by solving dp/dz = -(1/λ)(p)

### Questions (20)

 13 Exponential of a function times derivative 9 Does $|\mathcal P(A)|=|\mathcal P(B)|$ imply $|A|=|B|$? [duplicate] 7 Associative, non-commutative, non-trivial, analytic binary operation 6 Are there any positive integers $a, b, c, d$ such that both $(a, b, c)$ and $(b, c, d)$ are Pythagorean triples? 6 Is there a function $f(x)$ such that $f(f(x))=e^x$? [duplicate]

### Tags (75)

 22 calculus × 10 7 repunit-numbers 22 derivatives × 5 7 geometric-progressions 16 algebra-precalculus × 3 7 geometric-series 8 soft-question × 2 5 education 7 sequences-and-series 4 differential-geometry × 3

### Bookmarks (38)

 1411 Visually stunning math concepts which are easy to explain 270 Why do mathematicians use single-letter variables? 98 Unusual mathematical terms 85 Any rectangular shape on a calculator numpad when divided by 11 gives an integer. Why? 68 What is the oldest open problem in geometry?