Question

Which of the following rational number is positive *
(a)-8/7
(b)19/-12
(c)-4/-5
(d)-12/31​

Answer 1

Answer:

(C) -4/-5 ...........................

Answer 2

Answer:

We will learn about the positive rational number.

A rational number is said to be positive if its numerator and denominator are either both positive integers or both negative integers.

In other words, a rational number is positive, if its numerator and denominator are of the same sign.

Each of the rational numbers 1/4, 2/9, -7/-11, -3/-13, 5/12 are positive rationals, but 2/-5, -3/10, -4/7, 11/-23 are not positive rationals.

1. Is every natural number a positive rational number?

We know that, 1 = 1/1, 2 = 2/1, 3 = 3/1, 4 = 4/1 and so on ……..

In other words, any natural number n can be written as n = n/1, where n and 1 are positive integers.

Hence, every natural number is a positive (+ve) rational number.

Note: The rational number 0 is neither positive nor negative.