In exercises $(6-1),(6-2),$ and $(6-3),$ explore the effect of an elementary row operation on the determinant of a matrix. In each

case, state the row operation and describe how it affects the determinant.

$6-1)$

a b

c d

$,$

a b

kc kd

$6-2)$

a b

c d

$,$

a$+$kc b$+$kd

c d

$6-3)$

$$

$$

a b c

$322$

$656$

$$

$,$

$$

$$

$322$

a b c

$656$