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Negative exponent

A negative exponent describes a fraction

 


Example 0

In school you learned

You must know then already that 20 = 1 and 21 = 2.

 


Example 1

A negative exponent may be a rational number

 


Example 2

A division by zero is not defined, so

0–1 = ?

 


Example 3

You can calculate the reciprocal of the imaginary unit as

because the imaginary unit has no real value.

 


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