Question

true/false questions and give an 2 examples, help so far I have one example for each
1. 1 divides a for any a integer. true
eample1:since a/1=a->a=a*1 for all a integer
2. a divides a for any a integer. false
example1:cause a=o we know that's not true
3.a divides ab for any a,b integer .false
eample1:is not true that 0 divides 0 then taking a=o
4. -1 divides a for any a integer.true
eample1: a/9-10=-a->a=(-a)*1 and a is integer , -a is inegter