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# Algebra Glossary - V a|b|c|d|e|f|g|h|i|l|m|n|o|p|q|r|s|t|u|v|w|x|y|z

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# value of a series:

The simplified sum of a series.

# variable:

A symbol, usually a letter, that represents, and may be replaced by, any number from a particular set of numbers.

# vectors:

Matrices with either one row or one column.

# vertex of a parabola:

The point on a parabola midway between the focus and the directrix.

# vertical-line test:

If no vertical line intersects a graph of a relation more than once, then the re- lation is a function.

# vertices of an ellipse:

The endpoints of the major and minor axes.

# vertices of a hyperbola:

The two points in which a hyperbola is intersected by the line through the two focus points.