203 reputation
15
bio website
location Kharkov
age 28
visits member for 1 year, 11 months
seen May 19 '13 at 17:56

May
8
comment Can somebody provide an explanation to the formula of a one elementary integral?
@Artem, thank you very much!
Mar
30
comment Please, I need a more detailed explanation of the particular solution of the problem with vectors
@DonAntonio, thank you for the suggestion, I am from the former USSR and in our school this way of a solution of quadratic equations isn't taught. I never heard about it. Thanks.
Feb
28
comment Please, help me to find where is a mistake in the solutions of the equation.
@André Nicolas, I'm not sure, but as I understood this is true if we certainly know that this infinite geometric series converges. But how can I assume that from the condition? Because $1+sin(2x)$ is the exact value not greater than $2$ and not infinity?
Feb
28
comment Please, help me to find where is a mistake in the solutions of the equation.
@André Nicolas would you mind if I ask you to elaborate your comment with possible example? I did not understand.
Feb
28
comment Please, help me to find where is a mistake in the solutions of the equation.
$tan(x)=0$ is the subset of the $x_1=\pi k ,\space k \in \mathbb{Z}$, as I understood, isn't it?
Feb
2
comment Missing and parasite roots in the trigonometric equation.
yes, it works. Huge thanks to both of you.