Zol Tun Kul
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 Jul 13 asked The intersection line between $2x-5y+z=0$ and $y=0$ Jul 12 asked Finding the intersection point between two lines using a matrix Jul 12 asked What does it matter that this angle is the smallest between these two vectors? Jun 15 asked Getting the number of significant digits in a multiplication/division. Jun 14 asked Get the mass of air given the dimensions of a room. Oct 24 asked Does the line $(2,1,1)+t(-3,1,5)$ live within the plane $31x+3y+18z=62$? Oct 24 asked Why isn't the orthogonal vector to a direction vector of a plane not necessarily perpendicular to such plane? Oct 24 asked The normal equation of the plane that contains the line $(1,1,1) + t(-2,0,3)$ Oct 2 asked Deriving $\frac{8}{\sqrt{x-2}}$ Oct 1 asked Why $(-1 \cdot h) = -1$ when $h$ approaches $0$? Sep 20 asked Proving that $\lim_{x\to3}\frac{x}{4x-9}=1$ Sep 20 asked Why is $|(x-2)| < \delta \le 1$ true when proving $\lim_{x\to2}(3x^2-x)=10$? Sep 19 asked Why does $|x-1|^2+3|x-1| < \epsilon \implies |x-1|^2 < \frac{\epsilon}{2} \ \ \land \ \ 3|x-1| < \frac{\epsilon}{2}$? Sep 19 asked Proving $\lim_{x\to1}(x^2+3)=4$ Sep 12 asked Determinant of a matrix with trigonometry functions. Sep 7 asked Determining what values in a system can cause infinite/unique/no solutions. Sep 7 asked For what values of $p$ and $b$ is the vector $(b,8,b+7)$ a solution of this system? Sep 5 asked Determining the values of $b$ in $Ax=b$ to have a consistent system. Sep 1 asked Is $A$ invertible if $ABAB^2 = I$? Sep 1 asked Why does a matrix column being a multiple of another imply that the matrix is singular?