College Algebra: Solving for x in Log Equations

http://www.mindbites.com/lesson/793 for full video.

This lesson will teach you how to solve an equation with logs in it. To do this, you'll learn to use the properties of logs to combine all logs on one side of the equation. Once this is done, you'll convert the equation back to an exponential equation. Example problems you will work through in this lesson include log (base 2) x + log (base 2) (x-3) = 2 and ln x = 1/2* ln (2x+5/2)*x+ 1/2 ln 2

Taught by Professor Edward Burger, this lesson was selected from a broader, comprehensive Algebra course.

Category:

Education

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• logarithmic
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[THT1991]

you are a great teacher, but why cant you finish???!!!!!!!!!

[maralovesu]

the answer is 5 because if you put it in the expidentual form then you are looking for what power of two will give you 32. this is equal to 5 b/c 2x2x2x2x2=32 so x=5

[16teenagedream]

a whole lot of talking and joking and no actual PROBLEM SOLVING ! thanks for making me fail math this year , -______-

[iTRiiPZ360]

DA FUQ? YO I STILL NEED HELP!!!!!!! D:

[Ialwaysratezero]

@THT1991 They want you to buy the full video on their website

[amoydety]

ahhhh, why didnt u finish?

[PHILoMic]

this isnt college, unless college is rly bad in were ever u are

[burningdollparts]

why are these short. Are you suppose to purchase something?

[2r3tard3d]

@sonicfanrs Haha, well I started my first year of college this quarter and am currently majoring in Graphic Design, but will be switching to Computer Engineering pretty soon.

[sonicfanrs]

@2r3tard3d Ironicly, I'm currently an Engineering major -- however, I'm switching out next semester =)

[2r3tard3d]

@sonicfanrs Oh, and you also need to know about logarithms, because they are used in engineering course. :]

[2r3tard3d]

@sonicfanrs b/c these equations can express real life scenarios and x is any input that either works or doesnt work with that equation. For example, you can use the positions formula and plug in the time and previous position to find out where something would be after that amount of time has elapsed expressed by units.