Difference between revisions of "Sums"
From mispar
(→Sum of Squares) |
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[[category: #sum of cubes]] | [[category: #sum of cubes]] | ||
[[comment: 1-5]] | [[comment: 1-5]] | ||
+ | }}</div></div><br> | ||
+ | |||
+ | <div class="mw-collapsible mw-collapsed"><math>\scriptstyle\sum_{i=1}^{10} i^3</math><div class="mw-collapsible-content"> | ||
+ | {{#annotask: | ||
+ | [[category: #sum of cubes]] | ||
+ | [[comment: 1-10]] | ||
+ | }}</div></div><br> | ||
+ | |||
+ | <div class="mw-collapsible mw-collapsed"><math>\scriptstyle\sum_{i=4}^{10} i^3</math><div class="mw-collapsible-content"> | ||
+ | {{#annotask: | ||
+ | [[category: #sum of cubes]] | ||
+ | [[comment: 4-10]] | ||
+ | }}</div></div><br> | ||
+ | |||
+ | === Find the last term === | ||
+ | |||
+ | <div class="mw-collapsible mw-collapsed"><math>\scriptstyle\sum_{i=1}^{n} i^3=3025</math><div class="mw-collapsible-content"> | ||
+ | {{#annotask: | ||
+ | [[category: #sum of cubes]] | ||
+ | [[comment: aₙ, 1, 3025]] | ||
+ | }}</div></div><br> | ||
+ | |||
+ | === Cubes of Odds === | ||
+ | |||
+ | <div class="mw-collapsible mw-collapsed"><math>\scriptstyle\sum_{i=1}^{5} \left(2i-1\right)^3</math><div class="mw-collapsible-content"> | ||
+ | {{#annotask: | ||
+ | [[category: #cubes of odds]] | ||
+ | [[comment: 1-9]] | ||
+ | }}</div></div><br> | ||
+ | |||
+ | <div class="mw-collapsible mw-collapsed"><math>\scriptstyle\sum_{i=4}^{6} \left(2i-1\right)^3</math><div class="mw-collapsible-content"> | ||
+ | {{#annotask: | ||
+ | [[category: #cubes of odds]] | ||
+ | [[comment: 4-6]] | ||
+ | }}</div></div><br> | ||
+ | |||
+ | ==== Find the last term ==== | ||
+ | |||
+ | <div class="mw-collapsible mw-collapsed"><math>\scriptstyle\sum_{i=1}^{n} \left(2i-1\right)^3=1225</math><div class="mw-collapsible-content"> | ||
+ | {{#annotask: | ||
+ | [[category: #cubes of odds]] | ||
+ | [[comment: aₙ, 1, 1225]] | ||
}}</div></div><br> | }}</div></div><br> |
Revision as of 17:39, 8 January 2020
Contents
[hide]Sum of Natural Numbers
even number of terms = last term is even
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odd number of terms = last term is odd
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Find the last term
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Sum of Evens
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Find the last term
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Sum of Odds
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Find the last term
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Sum of Powers of Two = Sum of Even-Times-Even Numbers
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Sum of Powers of Three
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Sum of Powers of Four
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Sum of Squares
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Squares of Evens
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Squares of Odds
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Sum of Cubes
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Find the last term
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Cubes of Odds
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Find the last term
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