It is a rational number
No. An irrational number cannot be expressed as a/b where a and b are integers, b not zero. 18 = 18/1 = 36/2 = -36/-2 etc.
irrational
18 and 20
sqrt(18) = 3*sqrt(2) is an irrational number.
Yes it's a real number but it is an irrational number because it can't be expressed as a fraction.
NO!! Irrational Numbers are those where the decimal digits go to infinity AND there is no regular order in the decimal digits. pi = 3.141592.... is the most well known irrational number. as are the 'Square roots' od prime numbers;-# sqrt(2) = 1.414213.... sqrt(3) = 1.73205... sqrt(5) = 2.23606... However, such as numbers as 3.3333..... is NOT irrational, because the decimals are in regular order. Similarly 2.373737.... or 5 .678678678.... Are NOT irrational because the decimals are in a regular order. NB '....''' at the end of a decimal is the mathematical indication of recurring to infinity.
The square root of 18 is an irrational number because it cannot be expressed as a fraction.
It is neither because the square root of -18 is an imaginary number but the square root of 18 is irrational
Yes
It is a rational number
No. An irrational number cannot be expressed as a/b where a and b are integers, b not zero. 18 = 18/1 = 36/2 = -36/-2 etc.
No. √324 = 18 = 18/1 = a rational number.
irrational
18 and 20
sqrt(18) = 3*sqrt(2) is an irrational number.
No. It can be written as a fraction, so it is rational.