If a and b are integers, when is -1/a positive?

Answer 1

it would be positive when a is a negative number

A negative divided b a negative is positive.

Answer 2

what about 1/ab, when is that positive?

Answer 3

I think you posted this question already but Ill answer again.

In order for 1/ab to be positive meaning it is greater the zero the denominator must be positive since the numerator is positive.

Since both a and b are in the denominator to get a positive number a&b both have to be positive or they both have to be negative.

Did I explain clearly?

Answer 4

Yes, thank you.

Answer 5

Your welcome