Question

If 1/-1=-1/1
Then 1/i=i
But if you put the minus in the numerator it will be true.
The question is why can put the minus in the numerator and not in the denominator.

Answer 1

Answer:

Where does the negative sign go in a fraction? Usually, the negative sign is placed in front of the fraction, but you will sometimes see a fraction with a negative numerator or denominator. Remember that fractions represent division. The fraction

−

1

3

could be the result of dividing

−

1

3

, a negative by a positive, or of dividing

1

−

3

, a positive by a negative. When the numerator and denominator have different signs, the quotient is negative.

Negative 1 over positive 3 is equal to negative one third. Negative over positive equals negative. Positive 1 over negative 3 is equal to negative one third. Positive over negative equals negative.

If both the numerator and denominator are negative, then the fraction itself is positive because we are dividing a negative by a negative.

−

1

−

3

=

1

3

negative

negative

=

positive