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December 3rd, 2010, 11:30 AM  #1 
Newbie Joined: Dec 2010 Posts: 3 Thanks: 0  Exponential and Logarithmic functions and equations Part 2
Hi it's me again. This is part 2 of the pretest. ty [attachment=3:9mhh7y0t]11.PNG[/attachment:9mhh7y0t] 11. (8 x log 32/log 4 + 8 X log 8/log 2) – (log2 16)2 ( 20 + 24 )  (log2 16)2 44 – (log 16/log2)2 44 – (4)2 22 – 16 28 [attachment=2:9mhh7y0t]12.PNG[/attachment:9mhh7y0t] 12. This I'm Totally lost on  how to do it? [attachment=1:9mhh7y0t]13.PNG[/attachment:9mhh7y0t] 13. I believe I know how to do this and will post it soon once I get time to wrap my mind around it. Feel free to solve it if you like. I'll do it myself also. ty [attachment=0:9mhh7y0t]14.PNG[/attachment:9mhh7y0t] Ok and this one is the big mess up for me. Please help me with detailed instructions on how to solve it and the answer please. 14. 
December 3rd, 2010, 12:14 PM  #2 
Senior Member Joined: Nov 2010 Posts: 288 Thanks: 1  Re: Exponential and Logarithmic functions and equations Part
hello there u have amistake in question 11 the answer should be 16 notic that log 32 +log8 =log(32*=log 256=log4^4 since the base is 4 u get 4 so u have 8*4=32 now the other part is truly 16 so u have 3216=16 
December 3rd, 2010, 12:23 PM  #3 
Senior Member Joined: Nov 2010 Posts: 288 Thanks: 1  Re: Exponential and Logarithmic functions and equations Part
last question a: true loga+logb= loga*b this is arule in logarithm( u should make areview on the rules of logarithm) b:false: logalogb=log(a/b) (this is another rule) so the answer should be log(x^2/y) c:false mlogn=logn^m not the other way (this is another rule) d:true e:false loga)^m is not equal to 3logalogmn)^3=(logmn)^3 this is the simplest form f:false the root should be inside the log meaning log root(c^2) :root i mean the third root 
December 3rd, 2010, 12:28 PM  #4 
Member Joined: Nov 2009 Posts: 67 Thanks: 0  Re: Exponential and Logarithmic functions and equations Part Hi Bday, It might be useful to post these things one at a time so multiple helpers can jump on board. I'll pick 12A Simplify: 
December 3rd, 2010, 01:07 PM  #5  
Member Joined: Nov 2009 Posts: 67 Thanks: 0  Re: Exponential and Logarithmic functions and equations Part Quote:
(\log_216)^2=" />  
December 3rd, 2010, 01:19 PM  #6 
Global Moderator Joined: Oct 2008 From: London, Ontario, Canada  The Forest City Posts: 7,923 Thanks: 1123 Math Focus: Elementary mathematics and beyond  Re: Exponential and Logarithmic functions and equations Part
13A. 6 is no good! x = 3. 
December 3rd, 2010, 01:34 PM  #7 
Member Joined: Nov 2009 Posts: 67 Thanks: 0  Re: Exponential and Logarithmic functions and equations Part 13B Disregard 
December 3rd, 2010, 01:54 PM  #8 
Senior Member Joined: Jul 2010 From: St. Augustine, FL., U.S.A.'s oldest city Posts: 12,211 Thanks: 520 Math Focus: Calculus/ODEs  Re: Exponential and Logarithmic functions and equations Part
For 12B, use: so that becomes If your book meant then we would have: 
December 3rd, 2010, 02:47 PM  #9 
Global Moderator Joined: Oct 2008 From: London, Ontario, Canada  The Forest City Posts: 7,923 Thanks: 1123 Math Focus: Elementary mathematics and beyond  Re: Exponential and Logarithmic functions and equations Part
Another look at 12A: 
December 3rd, 2010, 06:39 PM  #10  
Senior Member Joined: Nov 2010 Posts: 288 Thanks: 1  Re: Exponential and Logarithmic functions and equations Part Quote:
 

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