Find the largest nonnegative a
16:43
A Vieta Problem
14:57
Find the closest integer
6:08
Trig Limits & the Squeeze Theorem
14:00
sqrt2, sqrt5 and sqrt7 cannot be terms of the same geometric progression.
17:08
n^4 + 3n^2 + 2 is never a perfect square
24:56
Integrate 1/(1+x^3)
8:24
Solve for all positive integers [Diophantine]
21:24