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1 036 765 views | 8 Nov. 2013

Watch the next lesson:

Wander Lust

HOLY SIGMA BLESS THIS RAVAGED BODY

Shawn Yama

It's funny that they they never teach this in school like they just expect you to know it.

Admin Iraneconomic

I am back here again, I dont use sigmas enough to hold them in my memory

Zack E

How do you do it if you don't want to increase by 1

JBW ___

Who else here is 14?

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14 132 views | 10 Jul. 2020

How can we assign D and L

Aryan Kumar gupta

Thanks a lot

Pravin Amrutakar

In bahal and bahal book their is mentioned in fisher projection group on horizontal bonds come towards the viewer and on vertical away from the viewer it is opposite as u say. Pls check it .

Nexcrowe

Which is more predominant? L or D?

Kotaru Kumari

While converting from wedge dash to fisher projection u said that if group is on right put it on left in fisher projection and if we do that vertical line groups are coming front and horizontal are going back

World of easy maths

Good explanation

Keep it up bro

Wish you a great success

(and)

Thankyou for making the vedio

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161 views | 13 Sep. 2020

Introducing the Choose Fit

Goran Adil

Dear Amelia, which book you use as a reference? and thanks for sharing these videos. do you plan to share rest of the course?

Luke

Loving the channel. Keep it up! Why aren’t you using smzeus”dot”com!!? It’s the best way to grow your channel.

3 650 views | days ago

119 389 views | days ago

6 224 views | days ago

is summation notation and sigma notation the same thing?

I learned more watching this video than a 1hr 40min tutorial I had yesterday. Thanks

Agh it reminds me of Java

So it's a

factorialbut it's in additionThank you Khan!

This is good information! Thanks for explaining.

6 years ago and still useful Thanks!

And then God said: "Let there be Math!"

oh basically substitution ?I thought it was something different

Eww i for index

sugma

Great explaination.???

is writing (i=) redundant? can you just put 1 and 10? do people sometimes retain the i?

I just mastered it like a pro

I am 12 years old and I finished learning quantum physics, and learning calculus and topology in string theory ???????????

How do you know what increment it is increased by? Is it always the value given by the index?

stem pa HAHAHAHAHAHA

math is amazing

As a programmer this is extremely trivial

"mathematical career" no i'm just trying to graduate high school... i'm never gonna use this again XD

Best explanation ... Thanku sir ?

What is the sigma notation of 10 + 30 + 130 + 630 +3130?

Is it weird that even though I use the website I still make sure to find and like the youtube video because its so amazing?

What’s sigma

Khan Academy would legit make any math problem look super easy in their tutorials! 10/10??

How do i write the summation notation of sum of the first 10 terms in 27,24,21??

Salam,

I am littely crying after watching this video..... trust me i have studied over 20 uears in colleges n unis but none had explained it so..... please keep tuting us all and maintain your contribution to develop humans.....

Online school got me here

Ahhhh this was a lifesaver. Tysm

does it mean the first sequence starts like: (1+1)+(1+2)+(1+3)+(1+4)+(1+5)... instead of starting by 1?

0+1+2+3+4+5+6+7+8+9+10, n=11

Sn= 11/2 (0+10)

Sn= 5.5(10)

Sn= 55

than...

1+2+3+4+5+6+7+8+9+10, n=10

Sn= 10/2(1+10)

Sn=5(11)

Sn=55

Is there any way to increment "i" by any number other than 1 ? (Using Sigma Notation)

Oh my god this is awesome ?????????️?️????

Your Track is great, i hope you listen my songs https://www.youtube.com/watch?v=g_7jkntnNZk

can the index be in decimals?

Nice method

Well explained well done bravo

we need to read it summation

It was this simple (◎0◎)ᵎᵎᵎ

Yeah but how do you do it without writing all the 50 terms out? Come on now.

WOW, I didn't realise thanks!

Was wondering how th this worked after getting out of work.

Basically factorial but addition

Thank you,i Will understand it easy-ly

were you not supposed to end at 49 as 50 is the position of the last number and you started with 0?

your handwriting is so beautiful

Any korean?

SOSOOOO THANKS

Wow thankyou sm... I'm some one who has a lot of problems in maths but after seeing this i'm def done w sigma notation ....wow you guys should try ITS AMAZING

Extremely clear of the explanation, even better than my college teacher. BTW Love your voice

What is that melody

.....

Sans?

This is so helpful. We use Prentice Hall textbooks at my school and they're basically worthless for explaining how to do problems. I've missed two days of Algebra 2 in a row and this video just brought me some hope. Thanks!

THXXXXXX

thayynk uuuuuuuuuu sooooooo much sir.....

really hard to see anything

THANK YOU SO MUCH NOW I'LL DO GOOD IN TOMORROWS EXAM.

thank you

........................................................................................................................................

Sigma balls

sir let me remind you something that you have forgot. there are people who cant't understand by the time your are doing your best but let me encourage you to the max please do you best to get those people in your box

makes it sound so easy!

so what is the sum of the the name that you wrote

YouTube teaches me more than actual teachers. Idk whether it's good or bad ?

Whos here for mr beasts riddle?

Not helpful

Σ

Why use i for index? i is taken already, that's confusing.

When you search for the lesson you don't understand on YouTube and multiple videos come up but you choose to watch Khan Academy.

Teacher literally said to learn this part ourselves when we had 15 minutes of class left at the end.

I added the second series in 10 seconds. The numbers can be paired off to sum 100 1 and 99, 2 and 98, etc. There are 49 pairs plus 50 plus 100 totaling 5050. This may be done for any series with any standard linear increment

Please, add the indonesian subtitle

Do you know Salaman Khan is founder of Khan academy Thanks so much sir....

You sigma notation and writing is better then my notebook writing.

Hey may I ask does the 'i' and 'n' represent the same thing? thanks in advance!

is there a formula for this in Excel? other than =SUM

Chad.

How do u pronounce that i need it reply asap

So, I have a large problem I want to solve. I am trying to find the circumference of an ellipse. I found a formula that is below

∞

C=π(a+b)Σ(.5/n)^2 *h^n

n=0

Is this formula correct, If so, how do I solve for an infinite sigma?

Hi there I am amazed by the tutorial...

Time to challenge the smart kid in my class.

Best academy for IT students thanks ...

What is the meaning of the i which is to the right of the sigma ?

What if the I starts at 6? Fck Math

Ligma

What is that melody?

I rather pay u than my bloody tuition?

My Calculus teacher didn’t explain these and we have a test with them on it today. Thanks for this guide it was easy to understand and now I feel like I understand it entirely.

What a useless thing it is

who else is studying for FINALS?

no way to change the incrementor? dangit :c

So basically what you're saying is that, using this method, we can shorten the patterns using this?

Oo oo? i don't believe that i will get my answer in 2 minutes

How do you write so beautifully with a mouse

Just do this (x+1)x/2 it works sometimes.