Question

What is the multiplicative identity matrix? What is it similar to in the set of real numbers? Explain your answer

Answer 1

An identity matrix, is a matrix that have '1' in the main diagonal. All of the other terms are '0'. When you multiply any matrix by the identity matrix, the result is the same matrix that you multiplied.

Example:

`\left[\begin{array}{ccc}1&0&0\\0&1&0\\0&0&1\end{array}\right]`

In the set of the real number is the same that the application of identity property.

Every number multiplied by 1 es the same number.

Explanation: