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20th term = 20*(20+1)/2

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13y ago

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How do you work out the 20th term of a sequence?

To find the 20th term of a sequence, first identify the pattern or formula that defines the sequence. This could be an arithmetic sequence, where each term increases by a constant difference, or a geometric sequence, where each term is multiplied by a constant factor. Once the formula is established, substitute 20 into the formula to calculate the 20th term. If the sequence is defined recursively, apply the recursive relation to compute the 20th term based on the previous terms.


If the 20th term in a sequence is 50 what is the 21st term?

Oh, dude, you just add one to the term number to get the next term. So, if the 20th term is 50, the 21st term would be the 20th term plus the common difference of the sequence. It's like basic math, man.


How do you find the 20th term?

To find the 20th term of a sequence, you need to identify the formula or pattern governing the sequence. For arithmetic sequences, you can use the formula ( a_n = a_1 + (n-1)d ), where ( a_n ) is the nth term, ( a_1 ) is the first term, ( n ) is the term number, and ( d ) is the common difference. For geometric sequences, the formula is ( a_n = a_1 \times r^{(n-1)} ), where ( r ) is the common ratio. Plug in the values to calculate the 20th term accordingly.


How do you find the 20th term of the pattern 3 6 12 24?

The pattern given is a geometric sequence where each term is multiplied by 2 to get the next term. To find the 20th term, we can use the formula for the nth term of a geometric sequence: ( a_n = a_1 \cdot r^{(n-1)} ), where ( a_1 ) is the first term (3) and ( r ) is the common ratio (2). Thus, the 20th term is calculated as ( a_{20} = 3 \cdot 2^{19} ). Evaluating this gives ( a_{20} = 3 \cdot 524288 = 1572864 ).


What is the 20th term for the sequence 3 6 9 12?

It is 60.


The first 6 triangular numbers are?

1, 3, 6, 10, 15 ,21 The nth term for the sequence (where you replace n with the term you want to find) is: (n(n+1))/2


How do you find the nth sequence term?

First, you must find the difference between the numbers, for example if the numbers were 3, 5, 7, 9, 11 then it would be 2. All you have to do is find out the difference between 2 and the first number, which happens to be 3. So 3-2 equals 1.so the equation would be2n+1you always use n for the nth sequence term


What is formed by multuiplying a term in a sequence by fixed number to find the next term?

what term is formed by multiplying a term in a sequence by a fixed number to find the next term


How do you find the 100th term of the sequence?

a + 99d where 'a' is the first term of the sequence and 'd' is the common difference.


What Find the 90th term of the arithmetic sequence 16,21,26?

The 90th term of the arithmetic sequence is 461


What is the form of the nth term of a triangular pyramidal number sequence?

1/6 n(n+1)(n+2)


What is the 20th term of 16 13 10 7 4 1 etc?

The sequence is Un = 19 - 3n so the 20th term is 19 - 3*20 = 19 - 60 = -41