# Precalculus Examples

Expand the series for each value of .

Cancel the common factor of .

Write as a fraction with denominator .

Factor out the greatest common factor .

Cancel the common factor.

Rewrite the expression.

Simplify.

Multiply and .

Divide by .

Simplify .

Write as a fraction with denominator .

Multiply and .

Multiply by .

To write as a fraction with a common denominator, multiply by .

Combine.

Multiply by .

Combine the numerators over the common denominator.

Multiply by .

Add and .

The result can be shown in both exact and decimal forms.

Exact Form:

Decimal Form:

Mixed Number Form: