WILL GIVE MEDAL PLEASE HELP :) Which sets of numbers are closed under subtraction? Choose all answers that are correct. A. whole numbers B. negative integers C. integers D. rational numbers

@texaschic101

Do you know the definition of when an operation is consider closed?

no :/

Ok an example of a set that closed under addition is the set of integers This means any two integers I take from the set of integers and add them I will still get a number in the set of integers. examples for my example: -1+(-1)=-2<--still an integer -1+0=-1<--still an integer An example of a set not being closed under addition is the set of irrationals. sqrt(2) is irrational but sqrt(2)+(-sqrt(2))=0 and 0 is not irrational

So your operation is subtraction do you know what the wholes numbers are?

yeah

can you think of example where the set is not closed under subtraction?

If you can think of one example, that is enough to conclude the set is not closed.

Think: What happens when you take a number and minus from it a greater number? like what is 5-7 or 0-1

:/

you can't tell me what 5-7 is?

2

Join our real-time social learning platform and learn together with your friends!