Domain of a simple rational function in interval and set notation

The video tutorial explains how to handle mathematical restrictions involving radicals and denominators. It emphasizes that denominators cannot be zero and introduces interval notation to represent all real numbers except specific values. The tutorial also covers preferred methods for writing domain notation, focusing on non-inclusion and union connections.

What should you consider when you see a radical in a mathematical expression?

• Denominator rule

• Restriction #1

• Restriction #2

• Infinity notation

What is the key restriction when dealing with denominators in expressions?

• Denominator must be positive

• Denominator cannot be zero

• Denominator must be an integer

• Denominator must be a fraction

Which value does not work for the expression X + 2?

• 5

• -2

• 0

• 3

How is the interval notation for all real numbers except -2 represented?

• (-∞, -2) ∪ (-2, ∞)

• (-∞, 0) ∪ (0, ∞)

• (-∞, 2) ∪ (2, ∞)

• (-∞, -2) ∪ (2, ∞)

What is the preferred method of writing domain notation?

• Using quality symbols

• Using union connections

• Using non-union connections

• Using equality symbols