# To give: An example of a natural number. ### Precalculus: Mathematics for Calcu...

6th Edition
Stewart + 5 others
Publisher: Cengage Learning
ISBN: 9780840068071 ### Precalculus: Mathematics for Calcu...

6th Edition
Stewart + 5 others
Publisher: Cengage Learning
ISBN: 9780840068071

#### Solutions

Chapter 1.1, Problem 1E

(a)

To determine

## To give: An example of a natural number.

Expert Solution

The example of a natural number is 2.

### Explanation of Solution

Natural numbers are the numbers which are used in counting.

That is, ={1,2,3,4,5,}.

Hence, natural numbers will be greater than zero and will have no fractions.

Therefore, the example of a natural number is 2.

(b)

To determine

### To give: An example of an integer that is not a natural number.

Expert Solution

An integer that is not a natural number is −4.

### Explanation of Solution

Integers are the set of all whole numbers which includes positive, negative values and also includes zero. And it is denoted by a letter .

That is, ={,3,2,1,0,1,2,3,}.

Natural numbers are counting numbers which means that they are greater than zero.

An example of an integer that is not a natural number can be a negative number or zero.

Therefore, an example of an integer that is not a natural number is −4.

(c)

To determine

### To give: An example of a rational number that is not an integer.

Expert Solution

The example of a rational number that is not an integer is 45.

### Explanation of Solution

A rational number is a number which is in the form pq where p and q are integers and q0. Also, if the decimal expansion of any number terminates or repeats, then such a number is called as a rational number.

For example; 23,12,45, are rational numbers.

A rational number that is not an integer can be any fraction because integers are the set of all whole numbers which are positive, negative numbers and also includes zero.

Therefore, an example of a rational number that is not an integer is 45.

(d)

To determine

### To give: An example of an example of an irrational number.

Expert Solution

The example of an irrational number is 2.

### Explanation of Solution

An irrational number is a number which cannot be expressed in the form pq, where p and q are integers and q0. Also, if the decimal expansion of any number does not terminate or repeat, then such a number is called an irrational number.

For example; 2=1.414213,π=3.1413 are irrational numbers.

Therefore, the example of an irrational number is 2.

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