Contrast this with the following case ab 2 1

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

View Full Document Right Arrow Icon
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: 1 a =2 2 b b 1 ab -2 ¹ 2 ab ab -2 = a Correct : Incorrect : In this case only the b gets the exponent since it is immediately off to the left of the exponent and so only this term moves to the denominator. Do NOT carry the a down to the denominator with the b. Contrast this with the following case. ( ab ) -2 = 1 ( ab ) 2 In this case the exponent is on the set of parenthesis and so we can just use property 7 on it and so both the a and the b move down to the denominator. Again, note the importance of parenthesis and how they can change an answer! Here is another common mistake. 1 11 1 = = a5 -5 -5 3a 3a 3 1 Incorrect : ¹ 3a 5 -5 3a Correct : In this case the exponent is only on the a and so to use property 8 on this we would have to break up the fraction as shown and then use property 8 only on the second term. To bring the 3 up with the a we would have needed the following. © 2007 Paul Dawkins 4 http://tutorial.math.lamar.edu/terms.aspx College Algebra 1 ( 3a ) -5 = ( 3a ) 5 Once again, notice this common mistake c...
View Full Document

Ask a homework question - tutors are online