How to write the sum in sigma notation given a geometric sequence

👉 Learn how to write the sum from a geometric series. A series is the sum of the terms of a sequence. A geometric series is the sum of the terms of a geometric sequence. The formula for the sum of n terms of a geometric sequence is given by Sn = a[(r^n - 1)/(r - 1)], where a is the first term, n is the term number and r is the common ratio.
To write the sum we will either be given the series as a sum or written in sigma notation. Either way, we will need to determine the rule of the sum by identifying the common ratio and first term.
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Organized Videos:
✅Series
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✅Series | Learn About
• Series | Learn About
✅Find the Sum of the Arithmetic Series
• Find the Sum of the Ar...
✅Find the Sum of the Geometric Series
• Find the Sum of the Ge...
✅Write the Rule of the Geometric Series
• Write the Rule of the ...
✅Find the Sum of a Series
• Find the Sum of a Series
✅Write the Rule of the Series
• Write the Rule of the ...
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[@kirpasingh3247]

This video is very helpful Mr. McLogan, and I really appreciate your help and support for students in need like us, thank you!

[@edouardtremblay3814]

his head is so shiny

[@berlykim6926]

I wish you were my math teacher HAHAHAHAH

[@troyaarav9971]

sorry to be so offtopic but does someone know of a way to log back into an Instagram account?
I was dumb lost the password. I appreciate any tips you can offer me.

[@tatumaxton3478]

@Troy Aarav instablaster :)

[@sylviaschiefer6761]

he looks like the bad guy in merry Christmas drake and josh

[@dudua.culanculan4316]

sir what if the given numbers are 1+4+9+16+25+36? i didn't get it idk how to find (r)

[@Junior-es7mu]

Did you find it?

[@mathfromtheheart]

This is solved using the sequence of differences.if you find the difference between two consecutive numbers those numbers (that is 3,5,7,9,11…) will form an arithmetic sequence. There is no r here .

[@iflamingo9264]

That rule is n^2 so I do not think it’s geometric

[@user-kr8tq2wi8d]

@@iflamingo9264 thx this help me

[@JD-xb9eo]

I can't believe my topic now is hard i remember when i was just learning a division..

[@sacdiyosiman971]

Why n = 1

[@lincolnperry7115]

sacdiyo siman darude - sandstorm

[@thelmabugarin8480]

He started at 1

[@Junior-es7mu]

@@thelmabugarin8480 hi what if the r is a negative how do I log base

[@andrejustinbayarong5509]

i didnt get why 28/14 is equals to 2? Hwelp

[@steelavocado1]

you shouldnt be in this math if you dont know what that is

[@ritzboo9490]

14 time 2 is equal to 28 lol. Coming from a double accelerated 8th grader

[@ritzboo9490]

andrejustin bayarong also he did 28/14 due to the fact that you needed to get r. Doing the opposite of multiplying to get the end goal of finding that r.

[@ritzboo9490]

the third term divided by the second term or the second term divided by the first thats all he did essentialy.