Week 2 – Math 10 – Negative Exponents

This week in math we learned about negative exponents and how to deal with them

Unlike with positive exponents, the bigger the exponent the larger the number. If you have a negative exponent and number will be smaller than 1.

24 = 16

23 = 8

22 = 4

21 = 2

20 = 1

2-1 = \frac{1}{-2}

2-2 = \frac{1}{-4}

2-3 = $latex \frac{1}{-8}

To solve for a negative fraction, we need to find the reciprocal fraction. For example \frac{2}{1} is the reciprocal of \frac{1}{2}. When we reciprocate a negative exponent, the exponent because positive and the question becomes easier to solve. Reminder, when you reciprocate, it only applies to the exponent, so a positive 4 will not become negative if you reciprocate it.

3-2

Reciprocate

\frac{1}{3^2} = \frac{1}{9}

A good way to remember this is too think about wanting to make the exponents happy. If a exponent is negative, or unhappy, move it to where it will be positive, or happy.

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