## Can you have parentheses inside parentheses?

Use brackets inside parentheses to create a double enclosure in the text. Avoid parentheses within parentheses, or nested parentheses. Correct: (We also administered the Beck Depression Inventory [BDI; Beck, Steer, & Garbin, 1988], but those results are not reported here.)

## Is square bracket inclusive?

The notation may be a little confusing, but just remember that square brackets mean the end point is included, and round parentheses mean it’s excluded. If both end points are included the interval is said to be closed, if they are both excluded it’s said to be open.

**How do you write a domain?**

Answer

- Identify the input values.
- Since there is an even root, exclude any real numbers that result in a negative number in the radicand. Set the radicand greater than or equal to zero and solve for x.
- The solution(s) are the domain of the function. If possible, write the answer in interval form.

### How do you write domain in set notation?

We can write the domain of f(x) in set builder notation as, {x | x ≥ 0}. If the domain of a function is all real numbers (i.e. there are no restrictions on x), you can simply state the domain as, ‘all real numbers,’ or use the symbol to represent all real numbers.

### What does R mean in domain?

For example, when we use the function notation f:R→R, we mean that f is a function from the real numbers to the real numbers. In other words, the domain of f is the set of real number R (and its set of possible outputs or codomain is also the set of real numbers R).

**Is Square Root of 0 rational or irrational?**

Zero has one square root which is 0. Negative numbers don’t have real square roots since a square is either positive or 0. The square roots of numbers that are not a perfect square are members of the irrational numbers. This means that they can’t be written as the quotient of two integers.

## What are 5 examples of rational numbers?

Positive and Negative Rational Numbers

Positive Rational Numbers | Negative Rational Numbers |
---|---|

All are greater than 0 | All are less than 0 |

Example: 12/17, 9/11 and 3/5 are positive rational numbers | Example: -2/17, 9/-11 and -1/5 are negative rational numbers |

## Is 1 rational or irrational?

The number 1 can be classified as: a natural number, a whole number, a perfect square, a perfect cube, an integer. This is only possible because 1 is a RATIONAL number.

**Is 2 rational or irrational?**

Sal proves that the square root of 2 is an irrational number, i.e. it cannot be given as the ratio of two integers.

### How do you know if a number is rational or irrational?

An irrational number is a number that cannot be written as the ratio of two integers. Its decimal form does not stop and does not repeat. Let’s summarize a method we can use to determine whether a number is rational or irrational. stops or repeats, the number is rational.