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Essentials of Precalculus with Calculus Previews, 6th Edition by Zill

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Review of Algebra

Integers

{ …, 4, 3, 2, 1, 0, 1, 2, 3, 4, …}

Positive Integers (Natural Numbers)

{1, 2, 3, 4, 5, …}

Nonnegative Integers (Whole Numbers)

{0, 1, 2, 3, 4, 5, …}

Rational Numbers

A rational number is a number of the form p/q, where p and q ≠ 0 are integers.

Irrational Numbers

An irrational number is a number that cannot be written in the form p/q, where p and q ≠ 0 are integers.

Real Numbers

The set R of real numbers is the union of the sets of rational and irrational numbers.

Laws of Exponents

Images

Negative Exponent

Images

Radical

Rational ...

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