So graphing functions is pretty much the same as

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: x = 2 . That means that we’ll need to avoid those two numbers. However, all the other values of x will work since they don’t give division by zero. The domain is then, © 2007 Paul Dawkins 183 http://tutorial.math.lamar.edu/terms.aspx College Algebra Domain : All real numbers except x = -5 and x = 2 [Return to Problems] (b) f ( x ) = 5 - 3 x In this case we won’t have division by zero problems since we don’t have any fractions. We do have a square root in the problem and so we’ll need to worry about taking the square root of a negative numbers. This one is going to work a little differently from the previous part. In that part we determined the value(s) of x to avoid. In this case it will be just as easy to directly get the domain. To avoid square roots of negative numbers all that we need to do is require that 5 - 3x ³ 0 This is a fairly simple linear inequality that we should be able to solve at this point. 5 ³ 3x Þ x£ 5 3 The domain of this function is then, Domain : x £ 5 3 [Return to Pr...
View Full Document

This note was uploaded on 06/06/2012 for the course ICT 4 taught by Professor Mrvinh during the Spring '12 term at Hanoi University of Technology.

Ask a homework question - tutors are online