Question

Simplifying $\frac{4\sqrt{7}}{3}\cos{\left(\frac{1}{3}\arccos{\frac{1}{\sqrt{28}}}\right)}+\frac{1}{3}$

score 612 · Answer 1 · 2016-07-06 21:18:52

612

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Simplifying $\frac{4\sqrt{7}}{3}\cos{\left(\frac{1}{3}\arccos{\frac{1}{\sqrt{28}}}\right)}+\frac{1}{3}$

Published on 06 Jul 2016 - 21:18

score 172 · Answer 2 · 2026-03-28 06:41:48

172

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$r$ and $s$ are roots of $ax^2+bx+c=0$ so what is the value of $\frac{1}{r^2}+\frac{1}{s^2}$ in terms of a b and c

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score 174 · Answer 3 · 2026-04-04 00:12:07

174

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score 62 · Answer 4 · 2026-03-27 14:59:10

62

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score 1.4k · Answer 5 · 2016-07-09 12:44:49

1.4k

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Finding the roots $x^4-4x^3-x^2-8x+4=0$ (contest math)

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score 190 · Answer 6 · 2016-07-09 16:08:30

190

Views

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score 75 · Answer 7 · 2026-04-11 08:40:02

75

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score 116 · Answer 8 · 2026-04-04 00:14:58

116

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score 166 · Answer 9 · 2026-03-27 14:58:22

166

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score 142 · Answer 10 · 2026-04-04 00:18:17

142

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45

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2.2k

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score 135 · Answer 13 · 2016-07-12 18:01:24

135

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Is this equation $(n+1)~x^{2n+1}-n~x^{2n}-n=0$ solvable in radicals for some $n \geq 2$?

Published on 12 Jul 2016 - 18:01

score 37 · Answer 14 · 2016-07-13 11:54:10

37

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Published on 13 Jul 2016 - 11:54

score 61 · Answer 15 · 2016-07-13 22:05:01

61

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List Question

Simplifying $\frac{4\sqrt{7}}{3}\cos{\left(\frac{1}{3}\arccos{\frac{1}{\sqrt{28}}}\right)}+\frac{1}{3}$

$r$ and $s$ are roots of $ax^2+bx+c=0$ so what is the value of $\frac{1}{r^2}+\frac{1}{s^2}$ in terms of a b and c

Find m so that the equation has integer solutions

$F(x,t)=a_n(t)x^n+ \ldots +a_1(t)x+a_0(t)$. Show that $F(\cdot , t_0)$ has exactly one zero using the Implicit Function Theorem

Finding the roots $x^4-4x^3-x^2-8x+4=0$ (contest math)

Hi! Just wondering if any one can help me out with this roots question?

Finding a value based on the roots of an equation

Is there a difference between $\sqrt{x+2}+x=0$ and $x^2-x-2=0$

how to find the the maximum of an implicit function

If $w$ is an imaginary cube root of unity, then the polynomial whose roots are $2w+3w^2$ and $2w^2 + 3w$ is?

Connecting First Passage Time to Power Spectrum

Can a polynomial of $n$ degree have $n+1$ distinct real roots?

Is this equation $(n+1)~x^{2n+1}-n~x^{2n}-n=0$ solvable in radicals for some $n \geq 2$?

Find the relative width of a guitar fret

Surjectivity on the image of a annulus

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