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Mathematics
Michael Hartley's user avatar
Michael Hartley's user avatar
Michael Hartley's user avatar
Michael Hartley
  • Member for 10 years, 11 months
  • Last seen more than 1 year ago
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answer
9
If $a$ is a root of $x^2+ x + 1$, simplify $1 + a + a^2 +\dots+ a^{2017}.$
Aug 28, 2017
answer
6
Fibonacci 19^n is multiple of 19 a mathematical property or a unique event?
Nov 24, 2022
answer
4
Let $G$ be a group isomorphic to $Z_{n_1} \oplus Z_{n_2} \oplus \cdots\oplus Z_{n_k}$.
Sep 8, 2023
answer
4
Calculus Functional Equation
Jul 4, 2023
answer
4
Write all permutations in the cyclic group $C_{12}$ ​of order 12 in cycle notation.
Nov 16, 2021
answer
4
The sequence $(x_n)$ : $x_{n+2}=\frac{x_{n+1}\sqrt{x_n^2+1}+x_{n}\sqrt{x_{n+1}^2+1}-x_n-x_{n+1}}{x_{n+1}x_n-(\sqrt{x_{n+1}^2+1}-1)(\sqrt{x_n^2+1}-1)}$
Aug 30, 2021
answer
4
Proving the sum to product formula with complex numbers starting from the left hand side
Aug 30, 2021
answer
4
A Number Theoretic Game
Jun 23, 2021
answer
4
If I flip two fair coins, and then tell you that one is heads, what is the probability that the other coin is also heads?
Feb 5, 2019
answer
4
Showing that either $v$ is an eigenvector for $2\times 2$ matrix $A$ or else $(A − \lambda \operatorname{Id})v$ is an eigenvector for $A$.
Feb 5, 2019