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seen Sep 29 at 13:40

Jul
30
awarded  Commentator
Jul
30
comment Modified balls and bins
What have you tried so far?
Jul
30
comment Represent code in math notation
What is the purpose of this?
Jun
20
comment Roulette probability
If your probability for winning is $p$, the probability for losing is $q = 1-p$. Independent random events(such as your roulette example or throwing a dice), allow you to multiply the probabilities.$$$$ E.g. scoring 6 twice in a row with a dice has a probability of one out of six, times one out of six: $\frac{1}{6}*\frac{1}{6}=\frac{1}{36}$.
Jun
19
answered What does ($\ln x$) or ($\log x$) mean?
Jun
18
answered Probability, combinations with repetition
Jun
18
comment Probability, combinations with repetition
Don't you have any information on the respective quantities of the different fruits?$$$$
Jun
18
comment How to write two for loops in math notation?
$$(1+2+3+4+5)^2$$
Jun
18
comment state space model
Basically, your fist equation is your system model, i.e. how you expect your system to move on to step 11 given step 10. $n(t)$ denotes the modeling error, e.g. errors due to numerical calculations.$$$$ The second equation describes your system observation i.e. the output of your sensors and can be anything from velocity to torque or position. The error term $v(t)$ denotes the measurement error which stems from non ideal sensors.
Jun
18
comment Solve $x^x=2x$ where $x\in\mathbb C$.
I can show you how I started: The Lambert W function is given as $z=W(z)*e^{W(z)}$. What you are trying to obtain is a expression on x which matches this function. You can start with $x^x=2x$ using the logarithm you obtain $x\ln{x}=\ln{2x}=\ln{2}+\ln{x}$. Then: $$x\ln{x}-\ln{x}=\ln{2}$$ $$(x-1)\ln{x}=\ln{2}$$ $$e^{\ln{x-1}}\ln{x}=\ln{2}$$ Now we almost arrived at the desired form. However, $x-1$ is still causing troubles...
Jun
18
answered Choosing balls out of a bag, replacing them by opposite colour
Jun
15
revised Find the fixed points
added
Jun
15
answered Find the fixed points
Jun
15
revised Find the fixed points
correction, fraction was $\frac{1-a}{b}$
Jun
15
suggested suggested edit on Find the fixed points
Dec
7
comment Finding a fix amount payment to payoff multiple credit cards in 24 months
You could also use Integer Linear Programming. But I agree in that I cannot see any purely analytic solution to this..
Dec
6
awarded  Editor
Dec
6
revised Exponential Distribution Probability question
adjusted the formula for better readability
Dec
6
suggested suggested edit on Exponential Distribution Probability question
Dec
5
awarded  Supporter