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Assignment 10
Calculate without the aid of a calculator:
.
Solution
Use the fact that the value of a fraction does not change when numerator and denominator are divided by the same nonnegative number. We apply this rule and subsequently divide by 
and 
, resulting in:
As an example, the numerator contains 
(that is 
) and the denominator contains 
(that is 
). If we divide both numerator and denominator by the result will be 
in the numerator and 
in the denominator.
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