Question

What is the result of multiplication by \[1\] for a matrix \[A\]?

पर्याय

• \[1\cdot A=-A\]

• \[1\cdot A=O\]

• \[1\cdot A=2A\]

• \[1\cdot A=A\]

Answer 1

The scalar \[1\] leaves every entry of \[A\] unchanged. Thus, multiplication by \[1\] gives \[1\cdot A=A\].