Logarithms | Logarithms | Algebra II | Khan Academy

Intro to logarithms. Learning that logarithms are just a way of expressing "the exponent that you have to raise a base to to get another number"

Missed the previous lesson?

Algebra II on Khan Academy: Your studies in algebra 1 have built a solid foundation from which you can explore linear equations, inequalities, and functions. In algebra 2 we build upon that foundation and not only extend our knowledge of algebra 1, but slowly become capable of tackling the BIG questions of the universe. We'll again touch on systems of equations, inequalities, and functions...but we'll also address exponential and logarithmic functions, logarithms, imaginary and complex numbers, conic sections, and matrices. Don't let these big words intimidate you. We're on this journey with you!

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[christophermoore]

This man is a saint.  What a wonderful time we live in where a guy like Mr. Khan is kind enough to share his intellect and teaching ability on the miracle that is the internet so people like me can learn in 2 minutes what an entire expensive 3 hour college algebra lecture failed to do.  Thank you, sir.  It's people like you that make the world go 'round.

[RPDBY]

maaan, I always used to think about logarithms as of somethings mysterious and completely incomprehensible, but 2 minutes of this this video completely changed it

[JonLG]

you were sent to this earth for a reason lol

[regret]

I got stuck on logarithm in high school, now my youngest son in 4th grade knows about it. I always had to just turn into the back of the book to find the logarithm, not understanding anything I was doing. Wow...simple and precise. Thanks Mr. Kahn.

[elijahdeliztakis]

Not a native English speaker here. When I use Khan Academy I'm glad I spent all those hours learning English. It was worth it.

[saifullahrahman]

thats it? thats all it is? i was afraid of this my whole life?

[vivianz]

I’m failing algebra 2 😭 hopefully I can learn everything online bc I’m currently not able to learn anything in class.

[GermaphobeMusic]

"Let's learn a little bit about the wonderful world of logarithms"

Sal sounds like he's on the verge of collapsing

[NNJAx]

Reviewing for college placement exams, really helped refresh my memory. thanks!

[wyatttomlinson]

These are fantastic review videos for studying for big tests! They're not just about learning, but re-learning as well. Now I'm getting more confident in my Honors Math 3 final tomorrow. Here we go!
Why aren't these used everywhere in Math classrooms? They should be!

[CrazySaqMasterVideos]

I really do love this dude, learn so freaking much from him.

[politicallil]

I must say I'm here some 10 years later, and you have provided the best explanation for something I have not dealt with in 40-plus years. It's funny, but you learn a lot of math that you never come into contact with in your career or everyday life. However, this math course is a part of problem-solving for job training, so I need to learn it to pass it.

[lanavest]

I'm brazillian, and this class substitued any math class i had in my hole life. Congratulations, and sorry for any english mistake ☺

[thasthakir]

It's Been 13 years and Still Saving Lives...

[theskyesfall]

Is anyone else here from google classroom cus school is closed and they started online learning

[glitterintheairxoxo]

These videos have made studying for the ACT so much easier. Thank you Sal!

[mattkessel]

Had to review logarithms for chemistry. Completely left my mind from high school pre calc. Thanks!

[screaminginagony]

Thank you so much! I have my exam soon and our teacher hated every one of us and explained absolutely terribly. I didn't understand this chapter throughout the entire year and you've finally helped me understand it IN 7 MINUTES. Our teacher couldn't do it in a year!

[system]

Had to skip a little bit [probably a unit or two] of Alg II because of a school change. This is very helpful!

[crpressler]

Will you be making a video that explains the natural log "e", or other uses of logarithms.
Thank You for making this video.