1 / 2

Exponents and Powers

Exponents and Powers. An expression like 2 3 is called a power 2 3 = 2  2  2 = 8 This expression is read as “two to the third power” or “two cubed” The repeated factor is the base The exponent indicates how many times the base is used as a factor

lyre
Download Presentation

Exponents and Powers

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Exponents and Powers • An expression like 23 is called a power • 23 = 2  2  2 = 8 • This expression is read as “two to the third power” or “two cubed” • The repeated factor is the base • The exponent indicates how many times the base is used as a factor • A power with an exponent of 2 such as 32 can be read as “three to the second power” or “three squared” • Variables can also be raised to a power • For example, x6 is x to the sixth power, or x ∙x ∙x ∙x ∙x ∙x • Evaluate a power by replacing the variable with its value and calculating the answer • Evaluate x4 for x = 3 • Evaluate x4 for x = -3 • Did you get the same answer? Why or why not? base →23 ←exponent

  2. Grouping symbols • Grouping symbols enclose parts of an expression that represent a single number • Parentheses ( ) • Brackets [ ] • Braces { } • Absolute value symbols | | also act as grouping symbols • A fraction bar is another grouping symbol • The numerator and denominator are separate expressions • Grouping symbols affect the result of power expressions • For example • -22 = -4, while (-2)2 = 4 • 1 + 23 = 9, while (1 + 2)3 = 27

More Related