The quotient of a nonzero rational number and its inverse? A, sign must be positive b, sign must be negative C, must be not less than zero d, must be greater than zero Why?

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• 1. How many?
• 2. The quadratic of the nth power of 9 is equal to the 8th power of 3, n, is equal to
• 3. If the sum of two rational numbers is positive, what are the two rational numbers 1 Is both positive 2 At least one is positive 3 At most one is a positive number 4 Is not 0 Say why? It's so weird. It's a. ? If the sum of two rational numbers is positive, what are the two rational numbers 1 Is both positive 2 At least one is positive 3 At most one is a positive number 4 Is not 0 Say why? It's so weird. It's a? ?
• 4. If the sum of two rational numbers is positive, then the two numbers () A. Must be all positive B. Must be negative C. Must be non-negative D. At least one is positive
• 5. Is the 0.5,5 cyclic decimal a rational number How to prove that 0.5,5 cycles are rational
• 6. If the sum of two numbers is known to be negative, then the two numbers must be seeking help from the great god If the sum of two numbers is known to be negative, then the two numbers must be seeking the help of the great god
• 7. If the sum of two numbers is negative, then the two numbers must be ()1. Both are negative 2. One is negative and the other is 0 3. At least one negative number
• 8. The following statements are true () A. An integer is a natural number B.0 is not a natural number C. Positive and negative numbers are collectively referred to as rational numbers D.0 is an integer and not a positive number The following statements are true () A. An integer is a natural number B.0 is not a natural number C. Positive and negative numbers are collectively called rational numbers D.0 is an integer and not a positive number
• 9. The following statements are correct:() A. There is no largest negative integer in the rational number B. There is no largest positive integer in the rational number C. The sum of the two numbers of the same sign is certain to be greater than the addend D. The sum of the two numbers of the different sign is certain to be less than the addend The difference must be () A. Positive number B. Negative number C.0 D. Can not determine the positive and negative
• 10. The smallest positive integer in the rational number is _ The largest negative integer is _ The smallest positive integer in the rational number is _ and the largest negative integer is _
• 11. If a, b, c are non-zero rational numbers, and a+b+c=0, ask... a difficult problem, how to do? A, b, c are nonzero rational numbers, and a+b+c=0, find all possible values of a/|a b/|b c/|c abc/|abc| It's so hard, who knows! Teach me,
• 12. If the sum of two nonzero rational numbers is zero, then their quotient is () A.0 B.-1 C.1 D. Not sure
• 13. If the sum of two rational numbers is -1 and the quotient is 1, then their difference is () and the product is ()
• 14. If the sum of two rational numbers is divided by the product of these two rational numbers, the quotient is equal to 0, then these two rational numbers () A. reciprocal B. opposite numbers C. There is a number 0 D. opposite to each other and not zero If the sum of two rational numbers is divided by the product of these two rational numbers, the quotient is equal to 0, then these two rational numbers () A. reciprocal B. opposite numbers C. There is a number 0 D. Opposite to each other and not zero
• 15. If a > b, ab <0, and |a|<|b|, can you compare the four numbers a, b,-a,-b?
• 16. The product of a nonzero rational number and the inverse of its reciprocal number is ______.
• 17. Write randomly two rational numbers with the same sign and compare their reciprocal sizes. Can you see how their reciprocal sizes relate to the original two numbers? Write randomly two rational numbers with the same symbol and compare their reciprocal sizes. Can you see how their reciprocal sizes relate to the original two numbers?
• 18. There are ten rational numbers, one of which is a square number, two opposite numbers, and two reciprocal numbers. If the product of these ten numbers is less than zero, then The number of positive numbers is at least () A.2, B.3, C.4, D.4 and above
• 19. The rational set is () A the set of positive and negative numbers B the set of positive integers, negative integers and fractions C the set of integers and fractions D the set of integers and D Set of integers and negative numbers The rational set is () A the set of positive and negative numbers B the set of positive integers, negative integers and fractions C the set of integers and fractions D the set of integers and D A collection of integers and negative numbers
• 20. If a rational number is represented by the letter a, is the number a a positive or negative? And give examples.