What is the general term of 1,2,4,7,11,16,22?
Is there any technique how to find the general term? plsss help me.
I'm not sure if this is a mathematical question, but it looks like you have posted a series of numbers that flow in the following way:
1+1 = 2
2+2 = 4
4+3 = 7
7+4 = 11
11+5 = 16
16+6 = 22
1 was added to the 1st number to get 2, that sum, 2, was added to 2, because it was the second number, to get 4. The sum of 4 was added to 3, because it was the third number, to get 7. Yada, yada, yada...
yah, but what is the exact formula to come up with this kind of problem.. thank you for your answer. ^^
To find the nth term of the sequence:
0.5*n^2 - 0.5*n + 1
If we look at the difference between successive terms, we see that the differences are not the same - so a linear function will not work.
1 2 3 4 5 6
But if we look at the difference between successive differences (second-order differences, if you will), we see that these are the same - so a quadratic function will work.
1 1 1 1 1 1
To find the function, I looked for some pattern. I listed the triangular numbers (1 3 6 10 15 21 27); the nth triangular number is the sum of the positive integers less than or equal to n. It appears as though the nth term of the sequence is adjusted down (by differing amounts) from the triangular number. Specifically, to find the nth term, we subtract (n-1) from the nth triangular number.
(Sum of numbers 1 through n) - (n-1)
= 0.5(n)(n+1) - n + 1
= 0.5*n^2 + 0.5*n - n + 1
= 0.5*n^2 - 0.5*n + 1
I know that I've merely given you my thought process rather than a hard, fast method to be applied every time. All I can say is that finding the nth term is like solving any other problem type: you get better with experience. You build an intuition.
I hope this helps.
I have exact formulae
But first I will regist it
Cool my all Maths expert
I would call this a sequential equation e.g. 1,2,4,7,11,16,22, 29. You see:
22+7=29.....and 29+8=37, 37+9=46, the main component is adding sequential numbers to the equation.
The simple formula of this number series is like that:-
1st Digit + 1= 2nd Digit,
2nd Digit + 2= 3rd Digit.
3rd digit + 3= 4th Digit.
So, Nth Digit = (N-1)th Digit + (N-1): It is the formula.
So, if n=5, then the 5th Digit = (5-1)th Digit+(5-1)
= 4th Digit + 4
= 7+4= 11.
Xn = X(n-1) + (n-1) is the formula you are looking for.
Where Xn is the nth (or general) term of the sequence.
So, X(n-1) is the term directly before Xn.
And (n-1) is just the integral value of n minus 1.
Xn = 11
X(n-1) = 7
n-1 = 5-1 = 4
So using the formula, 11 = 7 + 4
1 2 4 7 11 16 22
1st difference: 0 1 2 3 4 5 6 7.........
And so .....
next comes 29
Each time you add up one more than the last time.
So to the first no ie: 1 you add 1
Then you add 2,3,4,5,6,7
Yes there is a technique it is called Quadratic Sequence
1,2,4,7, 11, 16,22
Difference 1 2 3 4 5 6
And so on
1,2,4,7,11,16,22 next one is 29. check it once http://bit.ly/2pHf8sk
by michaelneLa 8 years ago
what is the general term of 1,2,7,11,16,22? thank you!what is the general term of 1,2,7,11,16,22? thank you!Is there any technique to find the general term? plsss help me..
by chipcat 7 years ago
The nth term of a sequence is 3n + 4 what is the 8th term of this sequenceHow do you work this out
by lellow111 8 years ago
what is the nth term of 51, 42, 33, 24, 15
by Goldysandhu 6 years ago
What is nth term of3+5+8+13+21+33........
by ahmed.muhamad 8 years ago
what is the general term of the sequance(0,2,0,2,....)
by Sharath perlampady 3 years ago
What is unit digit and how to find the unit digit of 7 to the power 105? (7^105)Please say easy method and please explain correctly, because no one in web explained correctly.
Copyright © 2019 HubPages Inc. and respective owners. Other product and company names shown may be trademarks of their respective owners. HubPages® is a registered Service Mark of HubPages, Inc. HubPages and Hubbers (authors) may earn revenue on this page based on affiliate relationships and advertisements with partners including Amazon, Google, and others.
|HubPages Device ID||This is used to identify particular browsers or devices when the access the service, and is used for security reasons.|
|Login||This is necessary to sign in to the HubPages Service.|
|HubPages Traffic Pixel||This is used to collect data on traffic to articles and other pages on our site. Unless you are signed in to a HubPages account, all personally identifiable information is anonymized.|
|Remarketing Pixels||We may use remarketing pixels from advertising networks such as Google AdWords, Bing Ads, and Facebook in order to advertise the HubPages Service to people that have visited our sites.|
|Conversion Tracking Pixels||We may use conversion tracking pixels from advertising networks such as Google AdWords, Bing Ads, and Facebook in order to identify when an advertisement has successfully resulted in the desired action, such as signing up for the HubPages Service or publishing an article on the HubPages Service.|