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May 02, 2026, 03:42:26 pm
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Author Topic: Chapter 5 Questions!!!  (Read 8761 times)  Share 

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Rosie

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Chapter 5 Questions!!!
« on: April 23, 2008, 05:17:15 pm »
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Can someone answer these 10 multiple choice questions for me together with worked solutions and steps because I can't do any of them. These are logorithmic type questions.
Thanks!


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Mao

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Re: Chapter 5 Questions!!!
« Reply #1 on: April 23, 2008, 05:36:48 pm »
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1.
try to simplify the right hand side into a single logarithmic expression

2.
break into two separate expressions

3.


4.
takes the intersection of the domain of f and g, and since f is an exponential function (defined for ), therefore C=B
and since the range of g excludes, 0, solve for h=0 to see if the range are the same or not.

5.
substitute x=5 and split the log

6.
simplify the two logs into one

7.
you'll need a calculator for this

8.
b is easy to find (think of the asymptote)
then just substitue (0,0) back into the equation

9.
graph this

10.
make LHS and RHS into single log expressions =)

hope those hints helped.
« Last Edit: April 23, 2008, 06:00:58 pm by Mao »
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Rosie

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Re: Chapter 5 Questions!!!
« Reply #2 on: April 24, 2008, 06:54:41 pm »
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I did some of the questions but could you explain to me how to solve questions 1,2,3,5,6 and 10. I read your replies but I don't know where to start.
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mark_alec

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Re: Chapter 5 Questions!!!
« Reply #3 on: April 24, 2008, 07:13:14 pm »
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Quote from: Rosie on April 24, 2008, 06:54:41 pm
I read your replies but I don't know where to start.
Would be nice if you could show the working you started doing, even if it is wrong, as it will help us help you find out where you can improve, rather than just doing your homework for you.
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Collin Li

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Re: Chapter 5 Questions!!!
« Reply #4 on: April 24, 2008, 07:17:17 pm »
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Quote from: mark_alec on April 24, 2008, 07:13:14 pm
Quote from: Rosie on April 24, 2008, 06:54:41 pm
I read your replies but I don't know where to start.
Would be nice if you could show the working you started doing, even if it is wrong, as it will help us help you find out where you can improve, rather than just doing your homework for you.
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Rosie

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Re: Chapter 5 Questions!!!
« Reply #5 on: April 24, 2008, 07:38:04 pm »
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Q1. 4logbIxI = logb16 + 8

4logbx = logb 16 + logb 8
4logb(x) = logb 16 X logb8
4logbx = logb128
Am I doing it right so far?
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Glockmeister

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Re: Chapter 5 Questions!!!
« Reply #6 on: April 24, 2008, 07:40:20 pm »
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Rosie

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Re: Chapter 5 Questions!!!
« Reply #7 on: April 24, 2008, 07:42:39 pm »
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4logbx = logb128
logbIxI = logb32

because 128 divided by 4 is 32

Then I don't know how to get rid of the modulus function
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Rosie

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Re: Chapter 5 Questions!!!
« Reply #8 on: April 24, 2008, 07:44:58 pm »
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Usually when you want to remove a number without any log, you replace the 8 with the same log and base as the other number.
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Glockmeister

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Re: Chapter 5 Questions!!!
« Reply #9 on: April 24, 2008, 07:54:09 pm »
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Are you referring to this log rule ?
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"this post is more confusing than actual chemistry.... =S" - Mao

[22:07] <robbo> i luv u Glockmeister

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Rosie

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Re: Chapter 5 Questions!!!
« Reply #10 on: April 24, 2008, 07:59:45 pm »
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Um, no I don't think so. I mean logb16 and 8 are not the same and can't be simplified like that.
Therefore, would it be practical to replace the 8 with logb8 so that these can be simplified?
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Collin Li

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Re: Chapter 5 Questions!!!
« Reply #11 on: April 24, 2008, 08:11:16 pm »
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Glockmeister

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Re: Chapter 5 Questions!!!
« Reply #12 on: April 24, 2008, 08:12:11 pm »
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Oh ok.

Well the short answer is no you can't do that, there is not log law that would allow you to replace with

EDIT: Was going to post the answer, but obviously coblin bet me to it.
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Rosie

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Re: Chapter 5 Questions!!!
« Reply #13 on: April 24, 2008, 08:17:45 pm »
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Thanks for that. The only thing I dont understand is why 8 becomes logb(b8). Is there a rule for this and does this apply to all logs.
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Collin Li

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Re: Chapter 5 Questions!!!
« Reply #14 on: April 24, 2008, 08:19:04 pm »
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