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visits member for 3 years, 11 months
seen Dec 1 at 20:39

Oct
24
accepted Does the line $(2,1,1)+t(-3,1,5)$ live within the plane $31x+3y+18z=62$?
Oct
24
accepted The normal equation of the plane that contains the line $(1,1,1) + t(-2,0,3)$
Oct
24
accepted Why isn't the orthogonal vector to a direction vector of a plane not necessarily perpendicular to such plane?
Oct
3
accepted Deriving $\frac{8}{\sqrt{x-2}}$
Oct
1
accepted Why $(-1 \cdot h) = -1$ when $h$ approaches $0$?
Sep
20
accepted Proving that $\lim_{x\to3}\frac{x}{4x-9}=1$
Sep
19
accepted Proving $\lim_{x\to1}(x^2+3)=4$
Sep
7
accepted For what values of $p$ and $b$ is the vector $(b,8,b+7)$ a solution of this system?
Sep
5
accepted Determining the values of $b$ in $Ax=b$ to have a consistent system.
Sep
1
accepted Is $A$ invertible if $ABAB^2 = I$?
Aug
21
accepted Factoring $x^3-8$ by grouping
Jul
7
accepted Finding two matrices that permit a change of variable eliminating the crossed term.
Jul
6
accepted Surjective linear transformations: is checking for linear independency enough?
Jul
6
accepted Gram-Schmidt: Do the sets have some sort of order?
Jul
5
accepted Calculating an orthonormal base given another base.
Jul
3
accepted Is this procedure for $5^{300} \bmod 11$ correct?
Jun
22
accepted How can a subspace have a lower dimension than its parent space?
Jun
21
accepted Orthogonal complement of a line in $\mathbb{R}^2$ spanned by $(1,2)$
Jun
19
accepted About vector orthogonality with itself and implication in a subspace's complement.
Jun
18
accepted If a vector fulfils one condition in this theorem, does it automatically fulfil both?