Question

3. Given integers a, b, c, d, verify the following:
(a) If a | b, then a | bc.
(b) If a | b and a | c, then a
2 | bc.
(c) a | b if and only if ac | bc, where c ≠ 0.
(d) If a | b and c | d, then ac | bd.

Answer 1

Answer:

all the above

Step-by-step explanation:

all the above