# ah-huh-moment.

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The most important thing is never lie to yourself. NBC.

 16 Limit of n-th root of $1/n$ 14 Find maximum without calculus 14 Evaluating the indefinite integral $\int \sqrt{\tan x} ~ \mathrm{d}{x}.$ 13 How to evaluate $\lim_{n\to \infty}\prod_{r=2}^{\infty}\cos\left(\frac{\pi}{2^{r}}\right)$ 12 Evaluating the following integral: $\int \frac{x^2}{\sqrt{x^2 - 1}} \text{ d}x$

# 20,856 Reputation

 +20 Obtain coefficients of a line from 2 points +20 What happens from $\displaystyle (1+(x+x^2))^n$ to $\displaystyle \sum_k {n \choose k} (x+x^2)^n$? +10 A quadratic polynomial is nonnegative for all $x$ if and only if the discriminant is nonpositive +10 Finding points that satisfy $f(a) = \sup f(x)$

# 10 Questions

 3 Convergence of type $1/(kn+r)$ type series 1 circumradii of triangle IAB 0 First Sum of Zetas 0 finite sum of riemann function 0 “point earner” problem: cousin of AM-GM

# 225 Tags

 350 calculus × 310 140 sequences-and-series × 114 168 limits × 113 122 inequality × 83 166 real-analysis × 143 119 trigonometry × 69 158 integration × 108 59 elementary-number-theory × 49 148 algebra-precalculus × 112 58 analysis × 46

# 1 Account

 Mathematics 20,856 rep 21235