The following statements are incorrect:() A. Any rational number has a reciprocal B. The product of two reciprocal numbers is 1 C. Two reciprocal numbers D. Negative reciprocal of 1 and -1 The following statements are incorrect:() A. Any rational number has a reciprocal B. The product of two reciprocal numbers is 1 C. Two reciprocal numbers D.1 and -1 are negative reciprocal
A and 0 are rational numbers, but 0 has no reciprocal. Therefore, this option is wrong.
B. Definition of numbers: If the product of two numbers is 1, we call these two numbers reciprocal.
C. Definition of reciprocal: If the product of two numbers is 1, we call these two numbers reciprocal, so they are the same number of reciprocal. Therefore, this option is correct.
D,1 and -1 are negative reciprocal, so this option is correct.
Therefore, A.
A and 0 are rational numbers, but 0 has no reciprocal. Therefore, this option is wrong.
B. Definition of numbers: If the product of two numbers is 1, we call these two numbers reciprocal.
C. Definition of reciprocal: If the product of two numbers is 1, we call these two numbers reciprocal, so they are the same number. Therefore, this option is correct.
D,1 and -1 are negative reciprocal, so this option is correct.
Therefore, A.
Are finite and infinite decimals rational?
A finite decimal must be a rational number infinite non-circulating decimal must be an irrational number infinite circulating decimal must be a rational number