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 Yearling
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2d
asked Theorem implication/equivalence transitiveness in demonstrations
Jun
26
comment Area of shadow and an object
Thoughts about the problem?
Jun
26
comment Is the complement of a closed set always open?
What's the problem?
Jun
24
comment Worst case binary search
When the computer makes a choice it selects the $n$-th digit in binary representation on the $n$-th iteration until it replicates the number you have given. So the idea to fool the computer is to make the selection process the longest as possible choosing numbers with long alternating binary representation.
Jun
24
comment Worst case binary search
Consider that numbers as 1/3 (=$0.\overline{01}$ in binary) will make the computer choose forever if $\epsilon \rightarrow 0$
Jun
24
comment Some integral proving
? $\,\,\,\,\,\,$
Jun
24
comment Find x, if $ \log _{15}\left(\frac{2}{9}\right)^{\:}=\log _3\left(x\right)=\log _5\left(1-x\right) $
The system of equations will give you $x_1$ and $x_2$, you'll have to check if $x_1=x_2$ because it's your initial condition: $\log_3(x) = \log_5(1-x) \Leftrightarrow \log_3(x_1) = \log_5(1-x_2) \wedge x_1=x_2$
Jun
24
comment Find x, if $ \log _{15}\left(\frac{2}{9}\right)^{\:}=\log _3\left(x\right)=\log _5\left(1-x\right) $
In the first change $\log_{15}$ in $\log_{3}$, in the second change $\log_{15}$ in $\log_{5}$ and then exponentiate sides of each equation.
Jun
24
answered Find x, if $ \log _{15}\left(\frac{2}{9}\right)^{\:}=\log _3\left(x\right)=\log _5\left(1-x\right) $
Jun
24
comment I have some maths homework and I really don't know what to do?
Try to answer to questions like: is 54.6 (a random number) in scientific notation or not? is 3.52 it? Why? Is 1/3 in scientific notation with 3 significant figures 0.333? If you are sure you've answered properly then apply the same reasoning to your questions (with right numbers...) otherwise seek where you haven't understood and why...
Jun
24
comment I have some maths homework and I really don't know what to do?
Please, don't ask homework solutions without minimum of elaboration and personal thoughts. I suggest you, as starting point, to study and understand the definitions, then to make some example to check if you have understood and then to make you problems...
Jun
22
awarded  Yearling
Jun
19
revised Does the series: $\sum_{n=1}^\infty (-1)^n \lbrack {\sqrt\frac{n}{2}} \rbrack$ Converge?
added 74 characters in body
Jun
19
answered Does the series: $\sum_{n=1}^\infty (-1)^n \lbrack {\sqrt\frac{n}{2}} \rbrack$ Converge?
Jun
17
comment Series $1$, $1$, $\frac12$, $\frac12$, $\frac13$, $\frac13$, etc.
what about Lagrange interpolation?
Jun
14
answered Integration of $\frac{f'(x)}{f(x)}$?
Jun
13
answered Polynomial Factorizations
Jun
13
comment Polynomial Factorizations
what have you tried? Any idea to solve it?
Jun
13
comment Computing periodic continued fractions.
you are welcome!
Jun
13
revised Computing periodic continued fractions.
added 20 characters in body