Question

if
A
is
maticx of order 4
and Al= 12.
what is the
value of the determinant of
the matrix obtained
by multiplying
every entry in Aby 2?
​

Answer 1

Step-by-step explanation:

If we multiply a scalar to a matrix A, then the value of the determinant will change by a factor ! ... The sign of the determinant will change if you interchange two rows - this has to do with the checkerboard pattern of the coefficients !