If a and b are two rational numbers, then which of the following might not be a rational number? A. a+b B. a−b5 C. ab D. ab
Which of the following is a rational number?
(a) √2
(b) √23
(c) √225
(d) 0.1010010001....
If a, b and c are three rational numbers, then which of the following will surely be a rational number? A. a+bc B. a−bc C. abc D. abc2