Which is an irrational number
0.12
0.1257486
0.12121212
0.111111
111
None of the above. An irrational number is a number that cannot be expressed as a fraction and has an infinite number of decimal places that do not repeat. Examples of irrational numbers include pi (3.14159...) and the square root of 2 (1.414213...).
#not helpful# ;b
An irrational number is a number that cannot be expressed as a fraction or a ratio of two integers. Among the given numbers, 0.12121212 is an irrational number.
To determine which number is irrational, we need to first understand what an irrational number is. An irrational number is a real number that cannot be expressed as a fraction of two integers and has an infinite number of non-repeating decimal places.
Now let's look at the given numbers:
1. 0.12: This number can be expressed as 12/100, or 3/25, so it is not irrational.
2. 0.1257486: This number can be expressed as a fraction by simplifying it. However, we can check if it is irrational by checking if it has a non-repeating decimal form using a calculator or software. It is likely to be irrational, but the exact classification requires verification.
3. 0.12121212: This number has a repeating decimal pattern of 12, so it can be expressed as a fraction of 12/99 (or simplified further). Therefore, it is not an irrational number.
4. 0.111111: This number also has a repeating decimal pattern of 1, so it can be expressed as a fraction of 1/9. It is not an irrational number.
To summarize, out of the given numbers, none appear to be irrational based on the information provided. However, it is important to note that an exact classification can only be made by verifying if a number has a non-repeating and non-terminating decimal representation.