More Than One Minus Sign in Simple Fractions: Problem 6
 Rule 4:
 If there is an even number of minus signs in a fraction, the
value of the fraction is positive.
If there is an odd number of minus signs in a simple fraction,
the value of the fraction is negative.
Problem 6: Find the value of the fraction
.

Answer.
 Since the value of the denominator is zero,
the fraction is undefined and therefore has no value.
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