apnorton

Member for 11 years, 8 months
Last seen more than a month ago

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Virginia, USA

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calculus

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37

When to do u-substitution and when to integrate by parts

Oct 24, 2013

35

Prove that $1 + 4 + 7 + · · · + 3n − 2 = \frac {n(3n − 1)}{2}$

Dec 4, 2014

32

Why does one counterexample disprove a conjecture?

Jul 10, 2013

30

Interview riddle

Jul 14, 2014

28

Moving point along the vector

Mar 18, 2013

Questions

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Score Activity Newest Views

49

Notation: Why write the differential first?

May 10, 2013

30

Proving the Riemann Hypothesis and Impact on Cryptography

May 8, 2015

22

Question from Putnam '89: Primes of the form $101\ldots01$

Aug 29, 2013

20

Notation Question: What does $\vdash$ mean in logic?

Jan 16, 2013

16

Functions for which $\int f(g(x))\, \mathrm dx = f\left(\int g(x) \, dx\right)$

Jun 27, 2013

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calculus

270

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108

posts

algebra-precalculus

127

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52

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functions

121

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26

posts

discrete-mathematics

104

Score

38

posts

elementary-number-theory

99

Score

29

posts

Reputation

+10

What is the meaning of $(2n)!$

+10

How do I remove a number from the numerator of a fraction so that I am left with the variable in the denominator in this equation?

+10

Filling in 'x' in a log function

+10

Given $f(x)=-x^2+1$ and $g(x)=\sqrt{x+1}$, find $k(x)=(g\circ f)(x)$?

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