Edith Mayer
2022-05-07
Answered

What is $\left(\begin{array}{cc}-3& 2\\ -6& 5\end{array}\right)$ plus $\left(\begin{array}{cc}6& -3\\ -6& 2\end{array}\right)$ ?

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Brennan Frye

Answered 2022-05-08
Author has **12** answers

Add the corresponding elements.

$\left[\begin{array}{cc}-3+6& 2-3\\ -6-6& 5+2\end{array}\right]$

Simplify each element of the matrix $\left[\begin{array}{cc}-3+6& 2-3\\ -6-6& 5+2\end{array}\right]$.

$\left[\begin{array}{cc}3& -1\\ -12& 7\end{array}\right]$

asked 2021-02-08

Let B be a 4x4 matrix to which we apply the following operations:

1. double column 1,

2. halve row 3,

3. add row 3 to row 1,

4. interchange columns 1 and 4,

5. subtract row 2 from each of the other rows,

6. replace column 4 by column 3,

7. delete column 1 (column dimension is reduced by 1).

(a) Write the result as a product of eight matrices.

(b) Write it again as a product of ABC (same B) of three matrices.

1. double column 1,

2. halve row 3,

3. add row 3 to row 1,

4. interchange columns 1 and 4,

5. subtract row 2 from each of the other rows,

6. replace column 4 by column 3,

7. delete column 1 (column dimension is reduced by 1).

(a) Write the result as a product of eight matrices.

(b) Write it again as a product of ABC (same B) of three matrices.

asked 2021-01-31

Find a basis for the space of $2\times 2$ diagonal matrices.

$\text{Basis}=\{\left[\begin{array}{cc}& \\ & \end{array}\right],\left[\begin{array}{cc}& \\ & \end{array}\right]\}$

asked 2021-11-07

asked 2020-11-03

Find x such that the matrix is equal to its own inverse.

$A=\left[\begin{array}{cc}7& x\\ -8& -7\end{array}\right]$

asked 2021-02-24

Write the set in the form {x|P(x)}, where P(x) is a property that described the elements of the set. {a,e,i,o,u}.

asked 2021-02-02

Given the matrices

$A=\left[\begin{array}{cc}-1& 3\\ 2& -1\\ 3& 1\end{array}\right]\text{and}B=\left[\begin{array}{cc}0& -2\\ 1& 3\\ 4& -3\end{array}\right]$
find the $3\times 2$ matrix X that is a solution of the equation.
8X+A=B

asked 2020-12-05

Let R be the relation on the set {0, 1, 2, 3} containing the ordered pairs
(0, 1),(1, 1),(1, 2),(2, 0),(2, 2),(3, 0). Find reflexive, symmetric and transitive closure of R.