Difference between revisions of "Sums"
From mispar
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=== even number of terms = last term is even === | === even number of terms = last term is even === | ||
+ | <div class="mw-collapsible mw-collapsed"><math>\scriptstyle\sum_{i=1}^8 i</math><div class="mw-collapsible-content"> | ||
{{#annotask: | {{#annotask: | ||
[[category: #sum of natural numbers]] | [[category: #sum of natural numbers]] | ||
[[comment: 1-8]] | [[comment: 1-8]] | ||
− | }} | + | }}</div></div><br> |
+ | |||
+ | <div class="mw-collapsible mw-collapsed"><math>\scriptstyle\sum_{i=1}^{10} i</math><div class="mw-collapsible-content"> | ||
{{#annotask: | {{#annotask: | ||
[[category: #sum of natural numbers]] | [[category: #sum of natural numbers]] | ||
[[comment: 1-10]] | [[comment: 1-10]] | ||
− | }} | + | }}</div></div><br> |
+ | |||
+ | <div class="mw-collapsible mw-collapsed"><math>\scriptstyle\sum_{i=1}^{12} i</math><div class="mw-collapsible-content"> | ||
{{#annotask: | {{#annotask: | ||
[[category: #sum of natural numbers]] | [[category: #sum of natural numbers]] | ||
[[comment: 1-12]] | [[comment: 1-12]] | ||
− | }} | + | }}</div></div><br> |
+ | |||
+ | <div class="mw-collapsible mw-collapsed"><math>\scriptstyle\sum_{i=1}^{20} i</math><div class="mw-collapsible-content"> | ||
{{#annotask: | {{#annotask: | ||
[[category: #sum of natural numbers]] | [[category: #sum of natural numbers]] | ||
[[comment: 1-20]] | [[comment: 1-20]] | ||
}} | }} | ||
+ | |||
+ | <div class="mw-collapsible mw-collapsed"><math>\scriptstyle\sum_{i=1}^{100} i</math><div class="mw-collapsible-content"> | ||
{{#annotask: | {{#annotask: | ||
[[category: #sum of natural numbers]] | [[category: #sum of natural numbers]] | ||
[[comment: 1-100]] | [[comment: 1-100]] | ||
− | }} | + | }}</div></div><br> |
+ | |||
=== odd number of terms = last term is odd === | === odd number of terms = last term is odd === | ||
+ | <div class="mw-collapsible mw-collapsed"><math>\scriptstyle\sum_{i=1}^{7} i</math><div class="mw-collapsible-content"> | ||
{{#annotask: | {{#annotask: | ||
[[category: #sum of natural numbers]] | [[category: #sum of natural numbers]] | ||
[[comment: 1-7]] | [[comment: 1-7]] | ||
− | }} | + | }}</div></div><br> |
+ | |||
+ | <div class="mw-collapsible mw-collapsed"><math>\scriptstyle\sum_{i=1}^{9} i</math><div class="mw-collapsible-content"> | ||
{{#annotask: | {{#annotask: | ||
[[category: #sum of natural numbers]] | [[category: #sum of natural numbers]] | ||
[[comment: 1-9]] | [[comment: 1-9]] | ||
− | }} | + | }}</div></div><br> |
+ | |||
+ | <div class="mw-collapsible mw-collapsed"><math>\scriptstyle\sum_{i=1}^{17} i</math><div class="mw-collapsible-content"> | ||
{{#annotask: | {{#annotask: | ||
[[category: #sum of natural numbers]] | [[category: #sum of natural numbers]] | ||
[[comment: 1-17]] | [[comment: 1-17]] | ||
− | }} | + | }}</div></div><br> |
+ | |||
+ | <div class="mw-collapsible mw-collapsed"><math>\scriptstyle\sum_{i=1}^{19} i</math><div class="mw-collapsible-content"> | ||
{{#annotask: | {{#annotask: | ||
[[category: #sum of natural numbers]] | [[category: #sum of natural numbers]] | ||
[[comment: 1-19]] | [[comment: 1-19]] | ||
− | }} | + | }}</div></div><br> |
== Sum of Evens == | == Sum of Evens == | ||
+ | <div class="mw-collapsible mw-collapsed"><math>\scriptstyle\sum_{i=1}^{4} 2i</math><div class="mw-collapsible-content"> | ||
{{#annotask: | {{#annotask: | ||
[[category: #sum of evens]] | [[category: #sum of evens]] | ||
[[comment: 2-8]] | [[comment: 2-8]] | ||
− | }} | + | }}</div></div><br> |
+ | |||
+ | <div class="mw-collapsible mw-collapsed"><math>\scriptstyle\sum_{i=1}^{6} 2i</math><div class="mw-collapsible-content"> | ||
{{#annotask: | {{#annotask: | ||
[[category: #sum of evens]] | [[category: #sum of evens]] | ||
[[comment: 2-12]] | [[comment: 2-12]] | ||
− | }} | + | }}</div></div><br> |
+ | |||
+ | <div class="mw-collapsible mw-collapsed"><math>\scriptstyle\sum_{i=1}^{10} 2i</math><div class="mw-collapsible-content"> | ||
{{#annotask: | {{#annotask: | ||
[[category: #sum of evens]] | [[category: #sum of evens]] | ||
[[comment: 2-20]] | [[comment: 2-20]] | ||
− | }} | + | }}</div></div><br> |
== Sum of Odds == | == Sum of Odds == | ||
+ | <div class="mw-collapsible mw-collapsed"><math>\scriptstyle\sum_{i=1}^{5} \left(2i-1\right)</math><div class="mw-collapsible-content"> | ||
{{#annotask: | {{#annotask: | ||
[[category: #sum of odds]] | [[category: #sum of odds]] | ||
[[comment: 1-9]] | [[comment: 1-9]] | ||
− | }} | + | }}</div></div><br> |
+ | |||
+ | <div class="mw-collapsible mw-collapsed"><math>\scriptstyle\sum_{i=1}^{6} \left(2i-1\right)</math><div class="mw-collapsible-content"> | ||
{{#annotask: | {{#annotask: | ||
[[category: #sum of odds]] | [[category: #sum of odds]] | ||
[[comment: 1-11]] | [[comment: 1-11]] | ||
− | }} | + | }}</div></div><br> |
+ | |||
+ | <div class="mw-collapsible mw-collapsed"><math>\scriptstyle\sum_{i=1}^{7} \left(2i-1\right)</math><div class="mw-collapsible-content"> | ||
{{#annotask: | {{#annotask: | ||
[[category: #sum of odds]] | [[category: #sum of odds]] | ||
[[comment: 1-13]] | [[comment: 1-13]] | ||
− | }} | + | }}</div></div><br> |
+ | |||
== Sum of Powers of Two = Sum of Even-Times-Even Numbers == | == Sum of Powers of Two = Sum of Even-Times-Even Numbers == | ||
+ | |||
+ | <div class="mw-collapsible mw-collapsed"><math>\scriptstyle\sum_{i=1}^{6} 2^{i-1}</math><div class="mw-collapsible-content"> | ||
{{#annotask: | {{#annotask: | ||
[[category: #sum of powers of two]] | [[category: #sum of powers of two]] | ||
[[comment: 1-32]] | [[comment: 1-32]] | ||
− | }} | + | }}</div></div><br> |
+ | |||
+ | <div class="mw-collapsible mw-collapsed"><math>\scriptstyle\sum_{i=1}^{7} 2^{i-1}</math><div class="mw-collapsible-content"> | ||
{{#annotask: | {{#annotask: | ||
[[category: #sum of powers of two]] | [[category: #sum of powers of two]] | ||
[[comment: 1-64]] | [[comment: 1-64]] | ||
− | }} | + | }}</div></div><br> |
+ | |||
+ | <div class="mw-collapsible mw-collapsed"><math>\scriptstyle\sum_{i=1}^{8} 2^{i-1}</math><div class="mw-collapsible-content"> | ||
{{#annotask: | {{#annotask: | ||
[[category: #sum of powers of two]] | [[category: #sum of powers of two]] | ||
[[comment: 1-128]] | [[comment: 1-128]] | ||
}} | }} | ||
+ | <div class="mw-collapsible mw-collapsed"><math>\scriptstyle\sum_{i=3}^{6} 2^{i-1}</math><div class="mw-collapsible-content"> | ||
{{#annotask: | {{#annotask: | ||
[[category: #sum of powers of two]] | [[category: #sum of powers of two]] | ||
[[comment: 4-32]] | [[comment: 4-32]] | ||
− | }} | + | }}</div></div><br> |
== Sum of Powers of Three == | == Sum of Powers of Three == |
Revision as of 10:25, 7 January 2020
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[hide]Sum of Natural Numbers
even number of terms = last term is even
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