henriv

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bio	website	deliquus.com
	location	Belgium
	age	17
visits	member for	1 year, 5 months
	seen	Feb 16 at 15:11
stats	profile views	20

Ah, mathematics...

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8 Questions

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6	Proof: $\mathrm{adj}(\mathrm{adj}(A)) = (\mathrm{det}(A))^{n-2} \cdot A$ for $A \in \mathbb{R}^{n\times n}$
4	Trigonometric equality $\cos x + \cos 3x - 1 - \cos 2x = 0$
2	Prove: if $A(x)$ is divisible by $(x-a)^m$, its derivative is divisible by $(x - a)^{m-1}$
2	Finding a particular solution to a non-homogeneous system of equations
2	Proof: $CA = I_n$ and $AD = I_m \Rightarrow C = D$

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247 Reputation

+5	Finding a particular solution to a non-homogeneous system of equations
+5	Proof: $\mathrm{adj}(\mathrm{adj}(A)) = (\mathrm{det}(A))^{n-2} \cdot A$ for $A \in \mathbb{R}^{n\times n}$
+10	Prove: if $A(x)$ is divisible by $(x-a)^m$, its derivative is divisible by $(x - a)^{m-1}$
+10	Plotting a quadratic equation in the $\,xy\,$- plane

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2 Answers

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3	A logic problem
1	Plotting a quadratic equation in the $\,xy\,$- plane

11 Tags

3 logic	0 trigonometry
1 homework × 2	0 divisibility
1 graphing-functions	0 derivatives
0 linear-algebra × 6	0 transformation
0 matrices × 3	0 determinant

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