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State restrictions on the variable.

State restrictions on the variable.-example-1
User David Cary
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There's one unforgivable taboo that transcends just about every branch of mathematics, and that's dividing by zero. Division by zero is undefined, so any fraction with a zero in its denominator is by definition absurd. For what values of x would the denominators on either of those fractions be zero? Those will define the restrictions on your variable.
User Wolfsshield
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