Indeterminate (variable)
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In mathematics, more precisely in algebra, an indeterminate is a quantity that is not known, and cannot be solved for. An indeterminate is different from a variable, which is solvable, at least conditionally, from a given equation or set of equations. To make this distinction in an example, compare these two situations.
1. Let x be a variable such that
- 2 + 3x = a + bx,
where a and b are some rational numbers. Then, we can solve for x, to find
- x = (a − 2) / (3 − b).
Any values of a and b with b not 3 will yield a value for x.
2. Let x be an indeterminate such that
- 2 + 3x = a + bx,
where a and b are again rational numbers. Since x cannot be solved for, we must have 2 = a and 3 = b.
[edit] See also
This article incorporates material from indeterminate on PlanetMath, which is licensed under the GFDL.
