Question

Which of the following is a rational number?

(a)√7 (b) 1/ √3 (c) 7-√9 (d) √7 + √9

Answer 1

Answer:

Option (c) is correct as 7 - 3 = 4

Answer 2

Answer:

(c) 7 - √9

explanation :

7-√9 = 7-(±3)

= 7-3 or 7+3

= 4 or 10