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 Jul 23 revised Simple Logarithms Equation added 30 characters in body Jul 23 comment Simple Logarithms Equation Assuming $x\in\mathbb{R}$, and since $3^x>0$ for all $x\in\mathbb{R}$, then $3-x>0$ which implies $x<3$. Jul 22 comment If I buy 2 lottery tickets do I double my chance of winning? Which gives $$\frac{1}{{49\choose 6}}=0.00000007151123842...$$ I'd better get a better paid job. Jul 22 answered compute the integral Jul 21 answered How to solve $z^3 + \overline z = 0$ Jul 13 revised How to remember trig identities? added 108 characters in body Jul 9 awarded Nice Answer Jul 8 revised How to remember trig identities? added 1 character in body Jul 8 revised How to remember trig identities? added 439 characters in body Jul 8 answered How to remember trig identities? Jul 7 awarded Popular Question Jul 6 revised Plot of $n$ concentric circles at once? edited title Jul 6 comment Plot of $n$ concentric circles at once? Don't you mean $-i^2$ in your third equation, and not $-n^2$ ... ? PS great question ! Jul 3 answered Trouble Understanding Notation in Reinforcement Learning Paper Jun 28 comment Integral with only a list of values I was a bit vague about the meaning of "under" because: suppose \$a