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What set is the union of the sets of non negative integers and negative integers?
It is a universal set
What is the difference between non negative integers and negative integers?
A non-negative integer is a whole number above 0, and a negative integer is a whole number below 0.
What is the sum of the first four non-negative consecutive even integers?
The sum of the first four non-negative, consecutive, even integers is 20.
Is all nonnegative integers are positive integers?
No. 0 is a non-negative integer which is not positive.
What is the sign of the product when you multiply four integers?
The sign of the product of four integers depends on the signs of the individual integers. There are 4 cases: 1) When all 4 integers share the same sign and all are non-zero (either all are positive or all are negative), the product is positive. 2) When 3 of the 4 integers share the same sign and all are non-zero (3 are positive and 1 is negative; or 3 are negative and 1 is positive), the product is negative. 3) When 2 of the integers are positive non-zero and the other 2 of the integers are negative non-zero, the product is positive. 4) If even one of the integers is zero, the product is zero (no sign - it is neither positive nor negative).
