954242509 112915007 log 7 0845098040 so sure enough

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: n to set the two exponents equal to each other and solve for x. 3x = 7 x - 2 2 = 4x 1 =x 2 So, if we were to plug x = 1 into the equation then we would get the same number on both sides 2 of the equal sign. [Return to Problems] 2 (b) 4t = 46-t Again, there really isn’t much to do here other than set the exponents equal since the base is the same in both exponentials. © 2007 Paul Dawkins 295 http://tutorial.math.lamar.edu/terms.aspx College Algebra t2 = 6 - t t2 + t - 6 = 0 ( t + 3)( t - 2 ) = 0 Þ t = -3, t = 2 In this case we get two solutions to the equation. That is perfectly acceptable so don’t worry about it when it happens. [Return to Problems] (c) 3z = 9 z +5 Now, in this case we don’t have the same base so we can’t just set exponents equal. However, with a little manipulation of the right side we can get the same base on both exponents. To do this all we need to notice is that 9 = 32 . Here’s what we get when we use this fact. 3z = ( 32 ) z +5 Now, we still can’t just set exponents equal since the right side now has two exponents. If w...
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