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Kaind

Apparently, this user prefers to keep an air of mystery about them.

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  • Member for 5 years, 5 months
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  • Last seen Jun 16 at 14:04

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8 For $a,b,c,d > 0$ and $abcd = 1$, show that $\frac{1}{a} + \frac{1}{b} + \frac{1}{c} + \frac{1}{d} + \frac{12}{a + b + c + d} \geq 7$ Jun 5 '19
7 Computing determinant of a specific matrix: Apr 22 '18
5 4 normals can be drawn from any point to an ellipse proof doubt: How do we know the key quartic has 4 distinct real roots? [duplicate] Aug 30 '18
4 Shortest distance between two non-intersecting differentiable curves is along their common normal Aug 14 '18
4 How did root of the equation $x= \sqrt{(2-x)(3-x)} + \sqrt{(3-x)(5-x)} + \sqrt{(2-x)(5-x)}$ vanish while solving? Jun 3 '18
4 Value of cos 1 (angle is in radians)? Jul 13 '19
4 Concavity/ Convexity of power means function? Apr 3
3 Find all the positive integers k for which $7 \times 2^k+1$ is a perfect square Sep 20 '18
3 If $f(x)\ge 0$ for every rational $x$, show that $f(x)\ge 0$ for all real $x$. Sep 23 '18
3 I'm just not getting the method Oct 6 '18
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