# Can a irrational number be expressed as a fraction?

## Can a irrational number be expressed as a fraction?

Real Numbers: Irrational Irrational Numbers: Any real number that cannot be written in fraction form is an irrational number. For example, and are rational because and , but and are irrational. All four of these numbers do name points on the number line, but they cannot all be written as integer ratios.

What can irrational numbers be expressed as?

Like all real numbers, irrational numbers can be expressed in positional notation, notably as a decimal number. In the case of irrational numbers, the decimal expansion does not terminate, nor end with a repeating sequence.

What is the difference between fraction and rational number?

A fraction is any number of the form a/b where both “a” and “b” are whole numbers and b≠0. On the other hand, a rational number is a number which is in the form of p/q where both “p” and “q” are integers and q≠0. Thus, a fraction is written in the form of m/n, where n is not 0 and m & n are whole (or natural numbers).

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### Why is pi an irrational number?

Pi is an irrational number, which means that it is a real number that cannot be expressed by a simple fraction. That’s because pi is what mathematicians call an “infinite decimal” — after the decimal point, the digits go on forever and ever. (These rational expressions are only accurate to a couple of decimal places.)

Why are irrational numbers denoted by S?

Answer: Irrational numbers are numbers that cannot be expressed as the ratio of two whole numbers. When expressed as a decimal, irrational numbers go on forever after the decimal point and never repeat.

Why all rational numbers are not fractions?

Every fraction is a rational number but a rational number need not be a fraction. Since every natural number is an integer. Therefore, a and b are integers. Thus, the fraction a/b is the quotient of two integers such that b ≠ 0.

## Can root 2 be written as a fraction?

Root 2 is an irrational number as it cannot be expressed as a fraction and has an infinite number of decimals. So, the exact value of the root of 2 cannot be determined.

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Is the difference of a rational and irrational number always irrational?

The sum or difference of a rational number and an irrational number is irrational.

Can some integers be irrational numbers?

Pi is an irrational number because it cannot be expressed as a ratio (fraction) of two integers: it has no exact decimal equivalent, although 3.1415926 is good enough for many applications. The square root of 2 is another irrational number that cannot be written as a fraction.

### How do you prove that a number is irrational?

To prove that a number is irrational, show that it is almost rational. Loosely speaking, if you can approximate \\alpha well by rationals, then \\alpha is irrational. This turns out to be a very useful starting point for proofs of irrationality.

What is the difference between an irrational number and an integer?

An irrational number is any real number that cannot be expressed as a ratio a/b, where a and b are integers, with b non-zero, and is therefore not a rational number. An integer is any real whole number. Basically, this means that an irrational number cannot be represented as a simple fraction.

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What makes something an irrational number?

An irrational number is any Real number that cannot be expressed as a ratio of two Integers. A Rational number can be expressed as such a ratio, hence rational. Irrational simply means not rational. The classic example of an Irrational number is $\\sqrt2$.