Question
14 Which of the following is an irrational number? A sqrt (25) B 10.25 C (2)/(3) D sqrt (18)
Solution
4.3
(310 Votos)
Lucas
Elite · Tutor por 8 anos
Resposta
The correct answer is D)
.An irrational number is a number that cannot be expressed as a fraction of two integers. In other words, it cannot be written as a simple fraction.Let's analyze each option:A)
: The square root of 25 is 5, which is a rational number because it can be expressed as the fraction
.B) 10.25: This is a decimal number that can be expressed as the fraction
, so it is a rational number.C)
: This is already in the form of a fraction, so it is a rational number.D)
: The square root of 18 cannot be simplified to a whole number or a simple fraction. It is an irrational number because it cannot be expressed as a fraction of two integers.Therefore, the correct answer is D)
.