Question

FORM Write the expression in exponential form. three cubed

Short answer

\(3^3\)

Step-by-step solution

Identification of Base and Exponent

The task is to write the expression 'three cubed' in exponential form. In this case, 'three' is the base and 'cubed' signifies that the exponent is 3. The phrase is describing a situation where the number 3 is being multiplied by itself twice more (which is three instances in total).

Conversion to Exponential Form

In exponential form, the base (3) is written first followed by the exponent (3) as a superscript. So 'three cubed' is written as \(3^3\) in exponential form.

Key concepts

Base and Exponent

When we talk about exponential forms, understanding the 'base' and the 'exponent' is crucial. The 'base' represents the number that is being repeatedly multiplied. For instance, if we have 'three cubed', 'three' is the base. The 'exponent', also known as the 'power', tells us how many times the base is multiplied by itself. It is visually represented as a small number above and to the right of the base. The term 'cubed' refers to the exponent 3, indicating multiplication of three instances of the base.
Thus in our example, 'three cubed' means 3 multiplied by itself twice more, which we can write as many 3s multiplied together: 3 × 3 × 3. The mathematical shorthand for this verbose expression is using exponential notation, which is more compact and easier to read as described next.

Writing Expressions

Writing mathematical expressions in a clear and accurate way is essential for effective communication of concepts. In the case of 'three cubed', expressing it in standard mathematical notation involves translating the words into a number and an exponent. Here, it helps to know the language associated with exponents: 'squared' means to the power of 2, 'cubed' means to the power of 3, and so forth.
To enhance understanding, remember that the expression starts with the base which in this case is the number 3. To 'cube' a number, such as the base, you use an exponent of 3. Hence, you write the base first, followed by the exponent as a superscript to its upper right, as in the example of converting 'three cubed' into exponential form.

Exponential Notation

Exponential notation is a form of mathematical shorthand that makes it easier to work with numbers that are multiplied by themselves. This concept is essential in simplifying large calculations and is pervasive in various fields of science and mathematics. It serves to make expressions more concise and manageable.
In exponential notation, you place the exponent, which is a positive integer, immediately above and to the right of the base. In our given example, 'three cubed' is succinctly written as \(3^3\). This effectively communicates that the base, 3, is used as a factor three times. The concept of exponential notation extends beyond whole numbers and can be applied to fractions, decimals, and even variables.