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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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