Powers and Exponents

Powers and Exponents - If the exponent is negative such as...

Info iconThis preview shows page 1. Sign up to view the full content.

View Full Document Right Arrow Icon
Powers and Exponents An  exponent  is a positive or negative number placed above and to the right of a quantity. It  expresses the  power  to which the quantity is to be raised or lowered. In 4 3 , 3 is the exponent and 4 is  called the base. It shows that 4 is to be used as a factor three times. 4 × 4 × 4 (multiplied by itself  twice). 4 3  is read as  four to the third power  (or  four cubed ).  Remember that  x 1  =  x  and  x 0  = 1 when  x  is any number (other than 0). 
Background image of page 1
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: If the exponent is negative, such as 3 –2 , then the base can be dropped under the number 1 in a fraction and the exponent made positive. An alternative method is to take the reciprocal of the base and change the exponent to a positive value. Example 1 Simplify the following by changing the exponent from a negative value to a positive value and then evaluate the expression....
View Full Document

{[ snackBarMessage ]}

Ask a homework question - tutors are online