Difference between revisions of "Sums"
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Revision as of 20:12, 7 January 2020
Contents
Sum of Natural Numbers
even number of terms = last term is even
![\scriptstyle\sum_{i=1}^8 i](/mediawiki/images/math/1/b/6/1b69f8aaa7d6b3aeda2972da6646ba87.png)
Category | Comment | Link | Annotated text |
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sum/sum of natural numbers | 1-8 | ספר_הכללים_במספר#zy8k | 77) 1, 2, 3, 4, 5, 6, 7, 8.
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![\scriptstyle\sum_{i=1}^{10} i](/mediawiki/images/math/4/7/3/4735da8c981b092086e14e8dda1d40dc.png)
Category | Comment | Link | Annotated text |
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sum/sum of natural numbers | 1-10 | קצת_מענייני_חכמת_המספר#mfsN | To know the numbers that are set in succession.
:![]() ![]() |
sum/sum of natural numbers | 1-10 | ספר_מעשה_חושב#oa4i | Example: if you want to sum one, two, three, four, and so on up to ten, including ten.
::![]() |
sum/sum of natural numbers | 1-10 | ספר_חשבון#QIjG | If a person says: 1, 2, 3, 4, 5, 6, 7, 8, 9, 10 - how much is the total?
:![]() |
sum/sum of natural numbers | 1-10 | ספר_החשבון_והמדות#4op2 | Example: we wish to add the numbers that are from 1 up to 10 one by the one.
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sum/sum of natural numbers | 1-10 | ספר_החשבון_לאל_חצאר#4THN | When you are told: sum from one to ten in arithmetic succession.
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sum/sum of natural numbers | 1-10 | ספר_החשבון_והמדות#QkuV | Example: we wish to know how much is the sum of the numbers that are from 1 up to 10.
:![]() |
![\scriptstyle\sum_{i=5}^{10} i](/mediawiki/images/math/2/c/6/2c602ade99ebe170fd0e3a35c93b03f5.png)
Category | Comment | Link | Annotated text |
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sum/sum of natural numbers | 5-10 | ספר_החשבון_לאל_חצאר#hJtL | If you are told: sum from five to ten.
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sum/sum of natural numbers | 5-10 | קצת_מענייני_חכמת_המספר#6eLr | If the numbers that are given in succession do not start from 1.
ואם המספרים המונחים על סדר המספר לא יתחילו מהא'
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![\scriptstyle\sum_{i=1}^{12} i](/mediawiki/images/math/5/2/6/526ea5fde5b6fe882188c59654803789.png)
Category | Comment | Link | Annotated text |
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sum/sum of natural numbers | 1-12 | ספר_חשבון#kTQb | If he continues his question until 12.
:![]() |
sum/sum of natural numbers | 1-12 | ספר_המספר_/_אברהם_אבן_עזרא#xE2F | Example: we wish to know how much is the sum up to 12?
:![]() |
sum/sum of natural numbers | 1-12 | מלאכת_המספר#V836 | Example: we wish to know the sum from one to 12.
::![]() |
sum/sum of natural numbers | 1-12 | לקוטים_מספר_פראלוקא#GKFV | Example: we wish to know the sum of all the numbers from 1 to 12.
::![]() |
![\scriptstyle\sum_{i=1}^{18} i](/mediawiki/images/math/e/5/9/e59dc84340e009671369c83fbbd527b8.png)
Category | Comment | Link | Annotated text |
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sum/sum of natural numbers | 1-18 | ספר_המספר_/_אברהם_אבן_עזרא#IeC7 | Another example for an even number [of terms]: how much is the sum up to 18?
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![\scriptstyle\sum_{i=1}^{20} i](/mediawiki/images/math/6/2/1/62192566b2e26e1419ace1f8f199d705.png)
Category | Comment | Link | Annotated text |
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sum/sum of natural numbers | 1-20 | ספר_חשבון#u3dY | If he continues his question until 20.
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sum/sum of natural numbers | 1-20 | עיר_סיחון#2heg | Question: we summed all the successive numbers from one to twenty and it is the sum. How much is the sum?
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![\scriptstyle\sum_{i=1}^{100} i](/mediawiki/images/math/a/4/a/a4abb16256d14a0ab9112528b7902823.png)
Category | Comment | Link | Annotated text |
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sum/sum of natural numbers | 1-100 | ספר_חשבון#YfUq | If he continues his question until one hundred.
:![]() |
odd number of terms = last term is odd
![\scriptstyle\sum_{i=1}^{7} i](/mediawiki/images/math/3/f/6/3f68c07e0c3f430cb7a5a461eede835c.png)
Category | Comment | Link | Annotated text |
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sum/sum of natural numbers | 1-7 | לקוטים_מספר_פראלוקא#xJHj | If you want to sum from 1 to 7.
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sum/sum of natural numbers | 1-7 | ספר_הכללים_במספר#bsMG | 78) 1, 2, 3, 4, 5, 6, 7.
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sum/sum of natural numbers | 1-7 | ספר_חשבון#Hvdz | As the one who says: I continue my calculation until 7. How much is the total?
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![\scriptstyle\sum_{i=1}^{9} i](/mediawiki/images/math/6/3/7/637b8949a98584f90be64c3defb7d487.png)
Category | Comment | Link | Annotated text |
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sum/sum of natural numbers | 1-9 | ספר_חשבון#2b1t | If he continues his question until 9.
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sum/sum of natural numbers | 1-9 | ספר_החשבון_והמדות#vKJf | Another example for an odd [number of terms]: we wish to know how much is the sum of the numbers from 1 up to 9.
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![\scriptstyle\sum_{i=1}^{11} i](/mediawiki/images/math/3/c/7/3c75ff92e48d7774f5acea0c0b570f4a.png)
Category | Comment | Link | Annotated text |
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sum/sum of natural numbers | 1-11 | עיר_סיחון#pHD6 | If we want to know how much are the numbers summed up up to eleven.
:![]() |
sum/sum of natural numbers | 1-11 | ספר_המספר_/_אברהם_אבן_עזרא#OprP | Example: we wish to know how much are the numbers that are summed from 1 to 11?
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![\scriptstyle\sum_{i=1}^{17} i](/mediawiki/images/math/b/0/1/b01ce1e0b1c54d9c015de3c51fea15ed.png)
Category | Comment | Link | Annotated text |
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sum/sum of natural numbers | 1-17 | ספר_חשבון#T2rf | If he continues until 17.
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![\scriptstyle\sum_{i=1}^{19} i](/mediawiki/images/math/0/3/3/033c26f928d4849dae96057e318bace2.png)
Category | Comment | Link | Annotated text |
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sum/sum of natural numbers | 1-19 | ספר_חשבון#CIoT | If he continues until 19.
:![]() |
Find the last term
![\scriptstyle\sum_{i=1}^{n} i=465](/mediawiki/images/math/b/7/7/b77ad5ceeeb0d9305737bbfb7037e5a8.png)
Category | Comment | Link | Annotated text |
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sum/sum of natural numbers | aₙ, 1, 465 | ספר_המספר_/_אברהם_אבן_עזרא#GXqn | Example: one asks: I sum all the numbers until they reach a known number and the sum is 465. How much is the last number?
:![]() |
Sum of Evens
![\scriptstyle\sum_{i=1}^{4} 2i](/mediawiki/images/math/2/d/4/2d4fa18977d97c1f8cc442ac038af8c5.png)
Category | Comment | Link | Annotated text |
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sum/sum of even numbers | 2-8 | ספר_הכללים_במספר#zzdV | 80) 2, 4, 6, 8 - that are evens.
:![]() |
![\scriptstyle\sum_{i=1}^{6} 2i](/mediawiki/images/math/b/9/7/b97262dc131aad47eca046e06e0c1039.png)
Category | Comment | Link | Annotated text |
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sum/sum of even numbers | 2-12 | ספר_חשבון#Gsfn | As 2, 4, 6, 8, 10, 12 - how much is the total?
:![]() |
sum/sum of even numbers | 2-12 | מלאכת_המספר#voap | Example of this: if the last even number is 12.
::![]() |
sum/sum of even numbers | 2-12 | ספר_דיני_ממונות#WfgD | 23) Question: if you want to know the sum of all the evens from 2 to 12.
:![]() |
![\scriptstyle\sum_{i=1}^{10} 2i](/mediawiki/images/math/a/2/8/a285db8c662a5d03e2ce82bd74c2d287.png)
Category | Comment | Link | Annotated text |
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sum/sum of even numbers | 2-20 | ספר_חשבון#qYPE | If he says: I continued until twenty.
:![]() |
Sum of Odds
![\scriptstyle\sum_{i=1}^{5} \left(2i-1\right)](/mediawiki/images/math/0/b/2/0b28aa40df722b9110aae0144f830594.png)
Category | Comment | Link | Annotated text |
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sum/sum of odd numbers | 1-9 | ספר_הכללים_במספר#djRx | 79) 1, 3, 5, 7, 9 - that are odds.
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sum/sum of odd numbers | 1-9 | ספר_חשבון#rGAn | As 1, 3, 5, 7, 9 - how much is the total?
:![]() |
sum/sum of odd numbers | 1-9 | ספר_מעשה_חושב#Mp2k | Example: If you want to sum the successive odds up to nine including one.
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sum/sum of odd numbers | 1-9 | ספר_דיני_ממונות#2PiX | 22) Question: sum all the odds from 1 to 9.
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![\scriptstyle\sum_{i=1}^{6} \left(2i-1\right)](/mediawiki/images/math/8/3/f/83f5036203ac6c375d6a3d827abaa5ae.png)
Category | Comment | Link | Annotated text |
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sum/sum of odd numbers | 1-11 | ספר_חשבון#NxSy | If he continues his question until 11.
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![\scriptstyle\sum_{i=1}^{7} \left(2i-1\right)](/mediawiki/images/math/6/b/2/6b28c794afd6f97115cc8cee56e069d0.png)
Category | Comment | Link | Annotated text |
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sum/sum of odd numbers | 1-13 | ספר_חשבון#2g6v | If he continues until 13.
:![]() |
Sum of Powers of Two = Sum of Even-Times-Even Numbers
![\scriptstyle\sum_{i=1}^{6} 2^{i-1}](/mediawiki/images/math/f/b/0/fb0cae1110546365b3b72cc65c1245d4.png)
Category | Comment | Link | Annotated text |
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sum/sum of powers of two | 1-32 | ספר_חשבון#y2at | As 1, 2, 4, 8, 16, 32.
:![]() |
sum/sum of powers of two | 1-32 | ספר_חשבון#6kg5 | Example: one says: I summed the doubles from 1 to 32. How much is their sum?
:![]() |
![\scriptstyle\sum_{i=1}^{7} 2^{i-1}](/mediawiki/images/math/5/c/e/5cea5d242ade6819a509d85d4339d342.png)
Category | Comment | Link | Annotated text |
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sum/sum of powers of two | 1-64 | ספר_חשבון#WJGn | If he says: I started from 1 and doubled until 64. How much is [their sum]?
:![]() |
![\scriptstyle\sum_{i=1}^{8} 2^{i-1}](/mediawiki/images/math/9/7/c/97caa6772ccc36f9200350d399dc2073.png)
Category | Comment | Link | Annotated text |
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sum/sum of powers of two | 1-128 | ספר_חשבון#IUR1 | If he says: I started from one and doubled until 128. How much is [their sum]?
:![]() |
sum/sum of powers of two | 1-128 | ספר_דיני_ממונות#29bw | 40) Question: if you want to know the sum of 1, 2, 4, 8, 16, and so on, each consecutive number is double the preceding number, and the last number is 128.
:![]() |
![\scriptstyle\sum_{i=3}^{6} 2^{i-1}](/mediawiki/images/math/0/a/c/0ace8465479c25342429b2a96d266717.png)
Category | Comment | Link | Annotated text |
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sum/sum of powers of two | 4-32 | ספר_חשבון#ghpP | If he says: I started from 4 and doubled until 32. How much is their sum?
:![]() |
Sum of Powers of Three
![\scriptstyle\sum_{i=1}^{4} 3^{i-1}](/mediawiki/images/math/6/0/2/602027d32d642f6ce4d362cba886083c.png)
Category | Comment | Link | Annotated text |
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sum/sum of powers of three | 1-27 | ספר_חשבון#mIQm | As 1, 3, 9, 27.
:![]() |
Sum of Powers of Four
![\scriptstyle\sum_{i=1}^{3} 4^{i-1}](/mediawiki/images/math/6/d/6/6d621542e4e9fcd459373f465fce7844.png)
Category | Comment | Link | Annotated text |
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sum/sum of powers of four | 1-16 | ספר_חשבון#aAn8 | As 1, 4, 16.
:![]() |
Sum of Squares
![\scriptstyle\sum_{i=1}^{7} i^2](/mediawiki/images/math/3/8/e/38efbd5b5d4f87c2d05b641564402607.png)
Category | Comment | Link | Annotated text |
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sum/sum of square numbers | 1-7 | ספר_המספר_/_אברהם_אבן_עזרא#ad1Q | Example: we wish to know how much are the squares up to seven?
:![]() |
![\scriptstyle\sum_{i=1}^{12} i^2](/mediawiki/images/math/f/c/d/fcdef0efbde9c6765c5fb2b2512dba52.png)
Category | Comment | Link | Annotated text |
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sum/sum of square numbers | 1-12 | ספר_המספר_/_אברהם_אבן_עזרא#nrny | Another example: how much is the sum of the squares up to 12?
:![]() |
Sum of Cubes
![\scriptstyle\sum_{i=1}^{5} i^3](/mediawiki/images/math/7/8/e/78e0d035cb68a26beafea8535dd62375.png)
Category | Comment | Link | Annotated text |
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sum/sum of cubic numbers | 1-5 | ספר_המספר_/_אברהם_אבן_עזרא#mhj4 | Example: we wish to know how much is the sum of the cubes up to 5?
:![]() |