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Feb
15
comment Bernoulli integral (conservation of energy)
ok, so my last question: does first solution contain the full solution? thank you for all your comments.
Feb
15
comment Bernoulli integral (conservation of energy)
thank you Tom! I didn't try to prove that.. what's about what I wrote in the topic, under the title: First solution ?
Feb
15
comment Bernoulli integral (conservation of energy)
I updated my topic :)
Feb
14
comment Bernoulli integral (conservation of energy)
thank you very much Tom! I think I will show them the both solutions, so I have one proof (of you). about the second proof: do you have a link with a solution of rewriting Euler equations to form (2.13)? and then the second solution will be the rewriting Euler equations to form (2.13) and after that I will write (2.14)-(2.19). BTW, what's about (2.1)-(2.12)? I don't need this? about your question, The lecturer wants me to lecture about this topic.. so I will have to learn the both solutions (I will learn it by myself when I get them).. thank you very very much!
Nov
28
comment Given a set $A$ such that for any family of sets $F$: if $\cup F = A$ then $A \in F$.
I know why but i dont know how to explain it.. the answer is: A doesn't belong to F because of the definition of F..
Nov
28
comment Given a set $A$ such that for any family of sets $F$: if $\cup F = A$ then $A \in F$.
can you give me an exaple of A and F? I think I dont really know what is F.. thank you!
Nov
28
comment Given a set $A$ such that for any family of sets $F$: if $\cup F = A$ then $A \in F$.
@DonAntonio, you are right. I translated the word to english and use a group instead of a set.
Nov
25
comment Prove that if $ |a_n-a_{n-1}| < \frac{1}{2^{n+1} }$ and $a_0=\frac12$, then $\{a_n\}$ converges to $0<a<1$
thank you Marty, but what's about: 0 < a < 1 ? does it show me that?
Nov
24
comment Prove that if $ |a_n-a_{n-1}| < \frac{1}{2^{n+1} }$ and $a_0=\frac12$, then $\{a_n\}$ converges to $0<a<1$
but what $a_n$ is?
Nov
23
comment what is $\displaystyle \lim_{n\to \infty }\ \left(\frac{1}{n}\right)^\frac{1}{\text{ln}\text{ ln}(n)}$
wow, thank you! although I didn't learn the operating of 'log', now I know it thanks to you! thank you!
Nov
15
comment proof of limits in math: if $a_n^3\to a^3$, then $a_n\to a$.
I'm sorry, but I don't know what to do if a is not zero. is it not the case that I wrote? :/ and you are right! the sequence is a sequence of real numbers..