Evaluating Logarithms

[Ariobarzanes1388]

Gotta... Fap... Fap... resist the hot steaming ... Fap, Voice!

[SuperLegacypk]

Aren't ln and e inverses of each other? they just cancel out and the exponent would still be the answer. seems like an easier way to do those.

really good video though :)

[IrvinShuffles1]

Damn your a beast your awesome you made my teacher look like a dumbass and my teacher sucks at teaching

[noobz0r]

helpful!

[Josh2393LY]

Thanks So much. You made this so much easier than My teacher did today. XD

[sushiegg]

this video is amazing anybody who help out people like you truly desevre credit for what they and you sound so honest so i for on belive every word said and + you help me understand =)

[suckmyoffFTW]

I fucking hate logs. It's the only part of Algebra II and Math Analysis that I have failed in.

[merependejo1]

thank you sooo much. you helped me alot!!

[opalkovochka07]

thanks! big help :)

[kikyohater2107]

I love your voice,

Also Thank you so much. Thanks to this I will be able to pass my test with an A and finsih my homework.

[bkuc9810]

Thank you.I now understand this for the most part. With some practice from my book, I think I will be all set for this part.

[tran61021]

ok..so basically u set up the equation..then u have to GUESS the answer??? u just plug in exponent values hoping it equals whatever is on the right side???? thats some bullshit i hate this..can someone explain to me why we have to guess???

[oflynnp1]

You don't have to just plug in exponent values using guess-and-check if you use the change-of-base formula. However, most math teachers are going to say that if you understand logarithms and exponents then there are some values that you SHOULD be able to just guess.

[tran61021]

change of base formula

lets say

y=log(2)8

change of base would be 8=2^y

right?

if tru, then what happens when u have a bigger number? how are u suppose to even know what number to start guessing with?

[tran61021]

ok so this time i watched the video all the way through, i understand the change of base formula, but i never applied it..i guess this is an event where i can apply it instead of the guess and check method..thanks, and hott voice too

[Klasanov]

That was in response to Tran's comment, BTW

[guaman04]

Thank you so much for posting this video!!!!! It helped a lot!!!!!

[Trackman2007]

her voice sounds too sexy to me so i can't concetrate as needed to get into subject...

[Luluismypomeranian]

what is so sexy about her voice? you aren't the first person to say this about it, but she sounds pretty nerdy to me.

[luv2break]

really helpful,and really sweet voice....

[nukebone]

Thank you, this is the only video where I fully understand what's going on here xD

[sillylili4887]

this is awesome becus my teacher makes it all confusing thanks.... LOL :D

[britnellshouse]

good stuff

[marielle019]

Thanks so much!

[oflynnp1]

You're welcome :)

[vkgoku2012]

What about the algebraic expression for natural logarithm base.

[oflynnp1]

What would you like to know?

[vkgoku2012]

I would like to know how to solve this sort of problem lnx+ln(x+1)=ln2

[oflynnp1]

Condense the left side:

ln[x(x+1)]=ln(2)

and distribute:

ln(x^2+x)=ln(2)

Then exponentiate both sides:

x^2+x=2

Then set the right side = 0 and use quadratic formula!

[blackknight509]

Great job w/ insturctions. Easily caught on. Doing this in my college algebra class.

[cyberprodigy]

beautiful voice. nice work ;

[richwarner4]

wish my teacher taught everything this way

[7ether]

Sorry, "easier"

[7ether]

Wow! I`m from China.

But I find these videos are much ersier than my teacher`s lessons for me to understand,though they are in English.

[oflynnp1]

Glad it helped. Sorry, my Chinese is a little rusty. ;-)

[metalgear500]

This helped a lot, thanks!

[Tdepp13]

Thx, this makes reviewing logs for pre calc easy :) wish you did some equations though.

[redsoxfanatic2468]

i wish my math teacher was as good as u..... THANKS!!!

[mhector3500]

omg u are a great at teaching this! And your voice totally makes me feel so confortable! Your great!

[imbecile23]

awesome! your style of teaching is easy to understand. please post more math videos (algebra2,trig,geo,pre-calc) if you have the time. much appreciated and thank you for the logarithm video.

[oflynnp1]

You're welcome, glad it helped!

[calexculux]

Pls explain more clearly instead of jumping steps.Talk clearly also.

[laka101]

i wish my alg2 teacher was like this!

[Showcase91]

Thank your keep up the good work

[oflynnp1]

You're welcome. :)

[ommy7778]

damn she got sexy voice,

[boxerguy2343]

this is so helpful thank you very much

[palas1250]

what program are u using for this explaination ?

[oflynnp1]

I'm using Hitachi Starboard software for my on-screen whiteboard, Camtasia Studio to create the screen recording, and Virtual TI for the on-screen calculator.

[aamircone93]

hey thanks man im in 9th grade now and i cant understand abt that changing logunder3 then up 2 like 7log_^ these type of stuff thanks for doing it bro really appreciate it

[wqzr]

your awesome

[EviscerVIII]

Thank you so much! I am so glad you posted this video; this helps me immensely!

[GTTTGT]

Thank you very much! This is the first time I have understood logarithms properly!

[GStewy91]

thank you so much. my understanding of logarithms,being in 10th grade,has been shaky-(especially since i'm homeschooled and have no teacher..) thank you SO MUCH for posting this video; God bless you! -amber rose

[Ducksuce3612]

o0mmgg thank you!!!

[sarahgoesrawrx]

thank you :)

[lotr143]

thank you very much

[sarahgoesrawrx]

i have a question :B

how would you solve Log 0.1?

[oflynnp1]

If no base is indicated then we assume that we are looking for log base 10 of 0.1. Since 0.1 = 1/10, the question to ask yourself is

"10 (the base) to what power would give an answer of 1/10?"

Since 10^-1 = 1/10, log base 10 of 0.1 = -1.

Hope that helps!

[krlss26]

what's the name of the program you used?

and congratulations, i hadn't understood this very well, but now i did. :D

THANK YOU

[oflynnp1]

I use a Hitachi Starboard for my whiteboard software, and I use Camtasia Studio to create/produce the screen recording.

And you are welcome, glad it helped. :)

[berberdude]

I really think that what you are doing here

Mrs. Oflynn, is superb. How you teach this concept makes everything easier to understand. Nice software by the way. I will hope that you will continue with your great videos. This benefits all who are eager to learn and strive to understand math concepts. 2 thumbs up. : )

[mephatboi]

could u do a video for inverse logs and their graphs?

thanks!!

[iMmoRtaLfrEnD704]

Wow, thank you so much for this video! This is so much simpler than my algebra/trigonometry book.

[zenrei18]

great explanation thank you for taking the time to do this

[carlitos181818]

my math teacher is an idiot, you´re great

[oflynnp1]

I appreciate the compliment, but it doesn't mean that your teacher is an idiot. It merely means that I've been teaching this topic for 10 years now. Trust me, I wasn't this clear when I began. :)

[shinyjewelsz]

I agree with carlitos. My teacher is an idiot, too. And my teacher has been teaching since the dinosaurs were alive I'm sure. But, she still has the teaching capability of cavemen! I really REALLY appreciate this video. It's amazing how can I get logarithms in a span of 10 minutes. When, with my teacher, weeks would go by and I still didn't understand what logs were! Thank you.

[GTTTGT]

LMAO!

[genericvideo1]

You helped me so much thank you!

[oflynnp1]

You are very welcome!

[GTTTGT]

Thanks so much!

[ADDICTEDTORADIOS]

Your tutorial cleared up some questions I had, however, I really need more help in 'getting it'. For example, "dB= 20log10(240/120) (The 240 and 120 are voltages) The answer is: 6.02 dB. I can figure this out on a scientific calculator, but have NO IDEA the reason for the problem itself--does this make ANY sense? The problem is dealing with cable television calculations. 

I'll continue to look at future postings to your site for answers! Thanks, addictedtoradios

[hman9981]

Your video is very good, please continue posting

[oflynnp1]

You are all very welcome. I record our class lessons for my students so they can replay them later to study, get homework help, etc. Glad it helped you.

[nida2192s]

thank you very much. this person explains it very well. i have an alg 2 final in two days and im freaking out. i hear its a very hard test.

[ShadowCat95825]

OMG! thank you sooo much i'm a senior and i have a huge final tomorrow.....

[Funkymunkeys]

Thanks for posting