Math & Data Science Q&A - Get answers from our AI that are verified by human experts
First time here? Checkout the FAQs!
x

*Math Image Search only works best with zoomed in and well cropped math screenshots. Check DEMO

MathsGee Android Q&A


0 like 0 dislike
170 views
What is the summation notation?
in Mathematics by Diamond (75,025 points) | 170 views

1 Answer

0 like 0 dislike
Best answer
A simple method for indicating the sum of a finite (ending) number of terms in a sequence is the summation notation. This involves the Greek letter sigma, \(\Sigma\). When using the sigma notation, the variable defined below the \(\sum\) is called the index of summation. The lower number is the lower limit of the index (the term where the summation starts), and the upper number is the upper limit of the summation (the term where the summation ends). Consider
\[
\sum_{k=2}^{7}(2 k+3)
\]
This is read as "the summation of \((2 k+3)\) as \(k\) goes from 2 to 7 ". The replacements for the index are always consecutive integers.
\[
\begin{aligned}
\sum_{k=2}^{7}(2 k+3) &=[2(2)+3]+[2(3)+3]+\left[2(4)^{k=3}+3\right]+[2(5)+3]+[2(6)+3]+[2(7)+3] \\
&=7+9+11+13+15+17 \\
&=72
\end{aligned}
\]
by Diamond (75,025 points)

Related questions

0 like 0 dislike
1 answer
1 like 0 dislike
1 answer
asked Dec 29, 2022 in Mathematics by MathsGee Platinum (164,234 points) | 20 views
0 like 0 dislike
1 answer
asked Dec 25, 2022 in General Knowledge by MathsGee Platinum (164,234 points) | 49 views
0 like 0 dislike
1 answer
asked Dec 25, 2022 in General Knowledge by MathsGee Platinum (164,234 points) | 41 views
1 like 0 dislike
1 answer
asked Oct 26, 2022 in Mathematics by MathsGee Platinum (164,234 points) | 48 views
0 like 0 dislike
1 answer
asked Oct 12, 2022 in General Knowledge by MathsGee Platinum (164,234 points) | 79 views
0 like 0 dislike
1 answer
asked Oct 12, 2022 in General Knowledge by MathsGee Platinum (164,234 points) | 70 views
1 like 0 dislike
1 answer
asked Sep 7, 2022 in Mathematics by Gauss Diamond (75,025 points) | 86 views
1 like 0 dislike
1 answer
asked Sep 7, 2022 in Mathematics by MathsGee Platinum (164,234 points) | 94 views
1 like 0 dislike
1 answer
asked Sep 7, 2022 in Mathematics by MathsGee Platinum (164,234 points) | 92 views
0 like 0 dislike
1 answer
asked Aug 17, 2022 in General Knowledge by MathsGee Platinum (164,234 points) | 127 views
0 like 0 dislike
1 answer
asked Aug 16, 2022 in General Knowledge by Gauss Diamond (75,025 points) | 89 views
0 like 0 dislike
1 answer
asked Jul 29, 2022 in General Knowledge by Gauss Diamond (75,025 points) | 116 views
1 like 0 dislike
1 answer
asked Jul 28, 2022 in Mathematics by MathsGee Platinum (164,234 points) | 97 views

Join MathsGee and get expert-verified answers to your maths and data science questions fast. We use a combination of generative AI and human experts to provide you the best answers to your questions. Ask a question now!


On the MathsGee, you can:


1. Ask and answer questions


2. Get expert-verified answers


3. Vote on questions and answers


4. Tip your favorite community members


5. Join expert live video sessions (Paid/Free)


6. Earn points by participating


7. Start a Fundraiser



Posting on MathsGee


1. Remember the human


2. Act like you would in real life


3. Find original source of content


4. Check for duplicates before publishing


5. Read the community guidelines




MathsGee Rules


1. Answers to questions will be posted immediately after moderation


2. Questions will be queued for posting immediately after moderation


3. Depending on the number of messages we receive, you could wait up to 24 hours for your message to appear. But be patient as posts will appear after passing our moderation.




MathsGee Android Q&A

MathsGee Android Q&A