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Lesson 2
The Arithmetic of Powers
Multiplication by addition, and division by subtraction
Let’s go over this carefully. We wanted you to write the product of 42 multiplied by 41 as a power of 4. We had given you the rule that the exponent of the product would be the sum of the exponents of the two numbers that were to be multiplied. So all you have to do is add the exponents in 42 and 41 to get the exponent of the product:
