Hidde
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 0 How do I interpret this mathematical model? 0 calculating a point on circumference 0 Intuitive Explanation of the graph $y = \sin x$ -1 probability question (dice)

### Reputation (172)

 +20 Solving $\phi (n) < (n-1) \cdot \frac{15499}{94744}$ +15 Solving $x^2 \cdot y^2 + x^2 + y^2 = c^2$ with $x$, $y$, $c \in \mathbb{Z}^+$ +5 Where does the 'divides' sign come from? +2 How do we get the result of the summation $\sum\limits_{k=1}^n k \cdot 2^k$?

### Questions (4)

 4 Solving $\phi (n) < (n-1) \cdot \frac{15499}{94744}$ 4 Where does the 'divides' sign come from? 3 Solving $x^2 \cdot y^2 + x^2 + y^2 = c^2$ with $x$, $y$, $c \in \mathbb{Z}^+$ 3 Graphically display $a^3+b^3+c^3 = d^3$

### Tags (14)

 0 trigonometry × 3 0 math-history 0 project-euler × 2 0 elementary-number-theory 0 geometry × 2 0 diophantine-equations 0 algebra-precalculus 0 totient-function 0 notation 0 inequality

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