Fundraise on MathsGee
First time here? Checkout the FAQs!
x

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

0 like 0 dislike
104 views
The 7th, 8th and 9th terms of a sequence are 61,69 and 77 respectively. Find a formula to describe this sequence.
in Mathematics by Diamond (55,179 points) | 104 views

1 Answer

0 like 0 dislike
Best answer

Looking at the differences,
seq
you can conclude that the sequence must be of the form
\[
u_{n}=8 n+c .
\]
For \(n=7, u_{7}=56+c\), giving \(c=5\).
Thus the formula to describe the sequence is
\[
u_{n}=8 n+5 .
\]

by Diamond (55,179 points)

Related questions

0 like 0 dislike
0 answers
0 like 0 dislike
1 answer
0 like 0 dislike
1 answer
1 like 0 dislike
1 answer
0 like 0 dislike
1 answer
1 like 0 dislike
1 answer

Join the MathsGee Learning Club where you get study and financial support for success from our community. CONNECT - LEARN - FUNDRAISE


On the MathsGee Learning Club, you can:


1. Ask questions


2. Answer questions


3. Vote on Questions and Answers


4. Start a Fundraiser


5. Tip your favourite community member(s)


6. Create Live Video Tutorials (Paid/Free)


7. Join Live Video Tutorials (Paid/Free)


8. Earn points for participating



Posting on the MathsGee Learning Club


1. Remember the human


2. Behave like you would in real life


3. Look for the original source of content


4. Search for duplicates before posting


5. Read the community's rules




CLUB RULES


1. Answers to questions will be posted immediately after moderation


2. Questions will be queued for posting immediately after moderation


3. Depending on how many posts we receive, you could be waiting up to 24 hours for your post to appear. But, please be patient as posts will appear after they pass our moderation.


MathsGee Android Q&A