Question

Which equality represents multiplication by the negative scalar \[-1\]?

विकल्प

• \[(-1)A=1\cdot A\]

• \[(-1)A=A\]

• \[(-1)A=O\]

• \[(-1)A=-A\]

Answer 1

A negative scalar of \[-1\] changes the sign of every matrix entry. The resulting matrix is the negative of \[A\], so \[(-1)A=-A\].