Writing Summations in Sigma Notation

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Learn how to write summations in sigma notation in this free math video tutorial by Mario's Math Tutoring. We go through some examples.

0:24 Difference Between a Sequence and a Series
0:33 Reviewing Sigma Notation
0:57 Example 1 3 + 5 + 7 + 9 +.....
1:08 Arithmetic Sequence Formula
1:50 Writing in Sigma Notation
3:00 Example 2 100 + 50 + 25 + ...
3:08 Using the Geometric Sequence Formula to Write in Sigma Notation
3:54 Example 3 (1/2) + (2/3) + (3/4) + ...+ (99/100)

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Teacher didn’t teach this, yet expected us to do it for homework. Thanks for teaching it !

Logomachy
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I really appreciate your concise clear explanation. I link your videos for my students often for review. Students claim it really helps them. I can not thank you enough as a fellow math teacher.

jonothanlister
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YOOO I GOT A 98% ON MY EXAM BECAUSE OF THIS

Logomachy
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My math teacher took half an hour to explain this on online school... you took 3 and a half minutes... thanks!

yeezuschrist
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Yeah Today is mine examination and i found this video thanks a lot sir lots of love from nepal❤❤🇳🇵

ewsyt
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Mr Mario, how about the last one ? I couldn't know if it's arithmetic or geometric

abdullahhamidaddin
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Mario you are my math savior. Thank You!!!

yvng_chldsupport
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the video doesnt show the last example, it cuts off

asfiyazainab
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Damn Johnny was a doctor, an astronaut, a technician, Now a Math Teacher????

justsomeguywithabeard
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Nice video
U deserve a like from me👍👍👍

rahul
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The last one answer:
( n/n+1)- formula of that series . i=1, n=99 on summation notation
(Is this correct🤔🙄)

iodinetogetherwithuranium
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I really needed the answer for the third one🙄

iodinetogetherwithuranium
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It is good but in the second question why you take (i-1) as apower??

ezedienseid
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I should've watch this before taking my test 😭😭

Akira-ndwi
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Sum =10*(2+59)=610.ans s=n(a+last term)/2

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