Precalculus Examples

$4$

The identity matrix or unit matrix of size $4$ is the $4 x \cdot 4$ square matrix with ones on the main diagonal and zeros elsewhere. In this case, the identity matrix is $[\begin{array}{c} 1 & 0 & 0 & 0 \\ 0 & 1 & 0 & 0 \\ 0 & 0 & 1 & 0 \\ 0 & 0 & 0 & 1 \end{array}]$ .

$4 [\begin{array}{c} 1 & 0 & 0 & 0 \\ 0 & 1 & 0 & 0 \\ 0 & 0 & 1 & 0 \\ 0 & 0 & 0 & 1 \end{array}]$

Multiply $4$ by each element of the matrix.

$[\begin{array}{c} 4 \cdot 1 & 4 \cdot 0 & 4 \cdot 0 & 4 \cdot 0 \\ 4 \cdot 0 & 4 \cdot 1 & 4 \cdot 0 & 4 \cdot 0 \\ 4 \cdot 0 & 4 \cdot 0 & 4 \cdot 1 & 4 \cdot 0 \\ 4 \cdot 0 & 4 \cdot 0 & 4 \cdot 0 & 4 \cdot 1 \end{array}]$

Simplify each element of the matrix $[\begin{array}{c} 4 \cdot 1 & 4 \cdot 0 & 4 \cdot 0 & 4 \cdot 0 \\ 4 \cdot 0 & 4 \cdot 1 & 4 \cdot 0 & 4 \cdot 0 \\ 4 \cdot 0 & 4 \cdot 0 & 4 \cdot 1 & 4 \cdot 0 \\ 4 \cdot 0 & 4 \cdot 0 & 4 \cdot 0 & 4 \cdot 1 \end{array}]$ .

Tap for more steps...

Simplify element $0, 0$ by multiplying $4 \cdot 1$ .

$[\begin{array}{c} 4 & 4 \cdot 0 & 4 \cdot 0 & 4 \cdot 0 \\ 4 \cdot 0 & 4 \cdot 1 & 4 \cdot 0 & 4 \cdot 0 \\ 4 \cdot 0 & 4 \cdot 0 & 4 \cdot 1 & 4 \cdot 0 \\ 4 \cdot 0 & 4 \cdot 0 & 4 \cdot 0 & 4 \cdot 1 \end{array}]$

Simplify element $0, 1$ by multiplying $4 \cdot 0$ .

$[\begin{array}{c} 4 & 0 & 4 \cdot 0 & 4 \cdot 0 \\ 4 \cdot 0 & 4 \cdot 1 & 4 \cdot 0 & 4 \cdot 0 \\ 4 \cdot 0 & 4 \cdot 0 & 4 \cdot 1 & 4 \cdot 0 \\ 4 \cdot 0 & 4 \cdot 0 & 4 \cdot 0 & 4 \cdot 1 \end{array}]$

Simplify element $0, 2$ by multiplying $4 \cdot 0$ .

$[\begin{array}{c} 4 & 0 & 0 & 4 \cdot 0 \\ 4 \cdot 0 & 4 \cdot 1 & 4 \cdot 0 & 4 \cdot 0 \\ 4 \cdot 0 & 4 \cdot 0 & 4 \cdot 1 & 4 \cdot 0 \\ 4 \cdot 0 & 4 \cdot 0 & 4 \cdot 0 & 4 \cdot 1 \end{array}]$

Simplify element $0, 3$ by multiplying $4 \cdot 0$ .

$[\begin{array}{c} 4 & 0 & 0 & 0 \\ 4 \cdot 0 & 4 \cdot 1 & 4 \cdot 0 & 4 \cdot 0 \\ 4 \cdot 0 & 4 \cdot 0 & 4 \cdot 1 & 4 \cdot 0 \\ 4 \cdot 0 & 4 \cdot 0 & 4 \cdot 0 & 4 \cdot 1 \end{array}]$

Simplify element $1, 0$ by multiplying $4 \cdot 0$ .

$[\begin{array}{c} 4 & 0 & 0 & 0 \\ 0 & 4 \cdot 1 & 4 \cdot 0 & 4 \cdot 0 \\ 4 \cdot 0 & 4 \cdot 0 & 4 \cdot 1 & 4 \cdot 0 \\ 4 \cdot 0 & 4 \cdot 0 & 4 \cdot 0 & 4 \cdot 1 \end{array}]$

Simplify element $1, 1$ by multiplying $4 \cdot 1$ .

$[\begin{array}{c} 4 & 0 & 0 & 0 \\ 0 & 4 & 4 \cdot 0 & 4 \cdot 0 \\ 4 \cdot 0 & 4 \cdot 0 & 4 \cdot 1 & 4 \cdot 0 \\ 4 \cdot 0 & 4 \cdot 0 & 4 \cdot 0 & 4 \cdot 1 \end{array}]$

Simplify element $1, 2$ by multiplying $4 \cdot 0$ .

$[\begin{array}{c} 4 & 0 & 0 & 0 \\ 0 & 4 & 0 & 4 \cdot 0 \\ 4 \cdot 0 & 4 \cdot 0 & 4 \cdot 1 & 4 \cdot 0 \\ 4 \cdot 0 & 4 \cdot 0 & 4 \cdot 0 & 4 \cdot 1 \end{array}]$

Simplify element $1, 3$ by multiplying $4 \cdot 0$ .

$[\begin{array}{c} 4 & 0 & 0 & 0 \\ 0 & 4 & 0 & 0 \\ 4 \cdot 0 & 4 \cdot 0 & 4 \cdot 1 & 4 \cdot 0 \\ 4 \cdot 0 & 4 \cdot 0 & 4 \cdot 0 & 4 \cdot 1 \end{array}]$

Simplify element $2, 0$ by multiplying $4 \cdot 0$ .

$[\begin{array}{c} 4 & 0 & 0 & 0 \\ 0 & 4 & 0 & 0 \\ 0 & 4 \cdot 0 & 4 \cdot 1 & 4 \cdot 0 \\ 4 \cdot 0 & 4 \cdot 0 & 4 \cdot 0 & 4 \cdot 1 \end{array}]$

Simplify element $2, 1$ by multiplying $4 \cdot 0$ .

$[\begin{array}{c} 4 & 0 & 0 & 0 \\ 0 & 4 & 0 & 0 \\ 0 & 0 & 4 \cdot 1 & 4 \cdot 0 \\ 4 \cdot 0 & 4 \cdot 0 & 4 \cdot 0 & 4 \cdot 1 \end{array}]$

Simplify element $2, 2$ by multiplying $4 \cdot 1$ .

$[\begin{array}{c} 4 & 0 & 0 & 0 \\ 0 & 4 & 0 & 0 \\ 0 & 0 & 4 & 4 \cdot 0 \\ 4 \cdot 0 & 4 \cdot 0 & 4 \cdot 0 & 4 \cdot 1 \end{array}]$

Simplify element $2, 3$ by multiplying $4 \cdot 0$ .

$[\begin{array}{c} 4 & 0 & 0 & 0 \\ 0 & 4 & 0 & 0 \\ 0 & 0 & 4 & 0 \\ 4 \cdot 0 & 4 \cdot 0 & 4 \cdot 0 & 4 \cdot 1 \end{array}]$

Simplify element $3, 0$ by multiplying $4 \cdot 0$ .

$[\begin{array}{c} 4 & 0 & 0 & 0 \\ 0 & 4 & 0 & 0 \\ 0 & 0 & 4 & 0 \\ 0 & 4 \cdot 0 & 4 \cdot 0 & 4 \cdot 1 \end{array}]$

Simplify element $3, 1$ by multiplying $4 \cdot 0$ .

$[\begin{array}{c} 4 & 0 & 0 & 0 \\ 0 & 4 & 0 & 0 \\ 0 & 0 & 4 & 0 \\ 0 & 0 & 4 \cdot 0 & 4 \cdot 1 \end{array}]$

Simplify element $3, 2$ by multiplying $4 \cdot 0$ .

$[\begin{array}{c} 4 & 0 & 0 & 0 \\ 0 & 4 & 0 & 0 \\ 0 & 0 & 4 & 0 \\ 0 & 0 & 0 & 4 \cdot 1 \end{array}]$

Simplify element $3, 3$ by multiplying $4 \cdot 1$ .

$[\begin{array}{c} 4 & 0 & 0 & 0 \\ 0 & 4 & 0 & 0 \\ 0 & 0 & 4 & 0 \\ 0 & 0 & 0 & 4 \end{array}]$

Combine the similar matrices with each others.

$[\begin{array}{c} 4 & 0 & 0 & 0 \\ 0 & 4 & 0 & 0 \\ 0 & 0 & 4 & 0 \\ 0 & 0 & 0 & 4 \end{array}]$

$[\begin{array}{c} 4 & 0 & 0 & 0 \\ 0 & 4 & 0 & 0 \\ 0 & 0 & 4 & 0 \\ 0 & 0 & 0 & 4 \end{array}]$ is in the most simplified form.

$[\begin{array}{c} 4 & 0 & 0 & 0 \\ 0 & 4 & 0 & 0 \\ 0 & 0 & 4 & 0 \\ 0 & 0 & 0 & 4 \end{array}]$

Enter YOUR Problem