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Un = n*(n2 + 3n + 2)/6 or n*(n+1)*(n+2)/6 for n = 1, 2, 3, ...

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What is the nth term in 5 10 20?

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How do you find the nth term?

Say if you had the pattern 15 20 25 30 35 40 45 50 To find the nth term you have to see what the gap between the numbers is. In our case this is 5. Then you have to find out what the difference between the gap and the first number. In this sequence it is 10. So your answer would be..... 5n+10 That's how you find the nth term.


What is nth term for 5 10 20 40 80?

The sequence 5, 10, 20, 40, 80 can be identified as a geometric progression where each term is multiplied by 2. The nth term can be expressed as ( a_n = 5 \times 2^{(n-1)} ), where ( a_n ) is the nth term. Thus, for any integer ( n ), you can find the term by substituting ( n ) into this formula. For example, the 1st term is 5, the 2nd term is 10, and so on.


Which of the following best completes the sequence 5 10 15 20?

The nth term is: 5n


What is the nth term of the sequence 4 8 12 16?

Given n and any number for the nth term, it is a simple matter to find a rule such that the above four numbers are the first four of a sequence and the given number in the nth position.However, the simple answer for simple questions is Un = 4n


What is the nth term of 4 12 20 28?

The nth term of the sequence is expressed by the formula 8n - 4.


What is the nth term and and the 14th term of the sequence of numbers 2 8 14 and 20?

They are: nth term = 6n-4 and the 14th term is 80


What is the nth term for 14 8 2 -4 -10?

f(n) = 14 - 6n -6n+20


Nth term for 11 ,31,51,72?

The given sequence is 11, 31, 51, 72 The nth term of this sequence can be expressed as an = 11 + (n - 1) × 20 Therefore, the nth term is 11 + (n - 1) × 20, where n is the position of the term in the sequence.


How do you find the nth term for this pattern- 10 20 40 80 160?

Oh, dude, finding the nth term for this pattern is like finding your favorite socks in the laundry - tedious but doable. So, to get from 10 to 20, you multiply by 2, then by 2 again to get 40, then 80, then 160. So, the pattern is just doubling each time. That means the nth term is 10 times 2 to the power of n-1. Easy peasy!


Nth term of the sequence 20 17 14 11 8?

This appears to be a declining arithmetic series. If it is, the next term is 5, because each term is 3 less than the preceding term.=================================The 'N'th term is: [ 23 - 3N ].


What is the Nth term for the sequence 5 20 45 80?

Divide the sequence by 5 and the answer becomes very obvious: 1, 4, 9, 16,...N2 So, 5, 20, 45, 80,...5N2