Mathematics
Rustem Sadykov's user avatar
Rustem Sadykov's user avatar
Rustem Sadykov's user avatar
Rustem Sadykov
  • Member for 4 years, 7 months
  • Last seen more than 2 years ago
  • Moscow, Россия
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35
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31
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3
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12
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3
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12
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8
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2
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All Questions Answers
Score Newest
question
3
Prove that there exists $\sqrt[3] 7 \in R$, real number cube of which is 7.
Sep 25, 2020
question
2
Let $A = {a \in G : a * a \neq e}$ Prove that $x \in A \iff x^{-1} \in A$
Oct 9, 2020
question
1
Proving basic complext numbers properties.
Sep 13, 2020
question
1
If S is a nonempty set, then $F^S$ is a vector space over F
Sep 13, 2020
question
1
f is surjective $\iff$ $g_1 \circ f = g_2 \circ f \to g_1 = g_2 $
Sep 16, 2020
question
1
Define a bijection between $Z^{X \cup Y}$ and $Z^X \times Z^Y$, where $X, Y \in \mathcal{P}(\Omega) $ and $X \cap Y = \emptyset$
Sep 17, 2020
question
1
Prove that any map $f : X \to Y$ can be represented as composition of 1) inj and surj. 2) surj. and inj.
Sep 20, 2020
question
1
There are no rationals $r, s$ such that $\sqrt{3} = r + s\sqrt{2}$. [duplicate]
Oct 12, 2020
question
1
Show that for an integer $n \ge 2$, the period of the decimal expression for the rational number $\frac{1}{n}$ is at most $n-1$.
Oct 14, 2020
question
1
Find the difference between the maximum and the minimum value of the function
Apr 4, 2021

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