Question

On $\sum_{n=0}^\infty \frac{1}{n^2+bn+c} = \frac{\pi \tan\big(\frac{\pi}2\sqrt{b^2-4c}\big)}{\sqrt{b^2-4c}}+x$ and solvable Galois groups?

score 132 · Answer 1 · 2026-04-15 18:41:09

132

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On $\sum_{n=0}^\infty \frac{1}{n^2+bn+c} = \frac{\pi \tan\big(\frac{\pi}2\sqrt{b^2-4c}\big)}{\sqrt{b^2-4c}}+x$ and solvable Galois groups?

Published on 15 Apr 2026 - 18:41

score 213 · Answer 2 · 2026-04-10 14:52:35

213

Views

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score 34 · Answer 3 · 2026-04-10 19:17:24

34

Views

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Published on 10 Apr 2026 - 19:17

score 674 · Answer 4 · 2026-04-17 03:56:38

674

Views

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score 86 · Answer 5 · 2026-04-15 06:05:06

86

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78

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score 27 · Answer 7 · 2026-04-16 05:07:10

27

Views

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score 420 · Answer 8 · 2026-04-14 06:28:24

420

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103

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1.3k

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score 70 · Answer 12 · 2026-04-12 11:52:47

70

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score 116 · Answer 13 · 2026-04-16 19:29:47

116

Views

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Published on 16 Apr 2026 - 19:29

score 183 · Answer 14 · 2026-04-14 04:51:23

183

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Published on 14 Apr 2026 - 4:51

score 304 · Answer 15 · 2026-04-16 15:05:43

304

Views

Translate and rotate the coordinate axes to put the quadric in standard position, $2xy+2xz+2yz-6x-6y-4z=-9$

Published on 16 Apr 2026 - 15:05

List Question

On $\sum_{n=0}^\infty \frac{1}{n^2+bn+c} = \frac{\pi \tan\big(\frac{\pi}2\sqrt{b^2-4c}\big)}{\sqrt{b^2-4c}}+x$ and solvable Galois groups?

Solve complex number equation with a given root

Solve the equation which has X as base and as a power

Find the coordinates of the points on the curve $y = 2x^3 - 9x^2 - 12x + 7$ where the gradient is 12

Which particle stays closest to the zero vector?

Quadratic inequality with a parameter

Show that if $P(x)=ax^2+bx+c$ defines some quadratic field $K=Q$, $ac$ is principal.

Proof for the maximal number of edges in an unconnected graph

Find the values of $k$ that satisfy $x_1> 1$ and $x_2 <1.$

Interesting Olympiad Style Problem about Invariance

When would Sajib return to home from school?

asymptotic distribution of quadratic form

How to solve for $t$ in $16((t^2-2)^2-2)-4(t^2-2)-2t=235$?

Quadratic forms in quadratic fields

Translate and rotate the coordinate axes to put the quadric in standard position, $2xy+2xz+2yz-6x-6y-4z=-9$

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