It means that the number is an integer, AND that it is not zero.
The set of nonzero integers is not closed under division. This is because dividing one nonzero integer by another can result in a non-integer. For example, ( 1 \div 2 = 0.5 ), which is not an integer. Therefore, the result of the division is not guaranteed to be a member of the set of nonzero integers.
The definition of a rational number is the quotient of any two nonzero integers.
Yes.
The quotient of two nonzero integers is the definition of a rational number. There are nonzero numbers other than integers (imaginary, rational non-integers) that the quotient of would not be a rational number. If the two nonzero numbers are rational themselves, then the quotient will be rational. (For example, 4 divided by 2 is 2: all of those numbers are rational).
Yes, it is.
The definition of a rational number is the quotient of any two nonzero integers.
No.
Yes.
Usually not.
The quotient of two nonzero integers is the definition of a rational number. There are nonzero numbers other than integers (imaginary, rational non-integers) that the quotient of would not be a rational number. If the two nonzero numbers are rational themselves, then the quotient will be rational. (For example, 4 divided by 2 is 2: all of those numbers are rational).
Eight - all nonzero integers are significant.
True.
Yes, it is.
Three. All nonzero integers are significant.
That a = ±b
yes
Five. Zeros that are after the decimal and are after nonzero integers are always significant.