Here we answer many questions about the sequence -40, -47, -54, -61... What type of sequence is -40, -47, -54, -61? What is the next number in the sequence -40, -47, -54, -61? What is the nth number in the sequence -40, -47, -54, -61? What is the sum of the first 20 terms in the sequence -40, -47, -54, -61? What is the sum of the first n numbers in the sequence -40, -47, -54, -61?
In addition, we will also give you the formula that is used to calculate the next number or the nth number in -40, -47, -54, -61, and the formula to calculate the sum of n numbers in -40, -47, -54, -61.
A sequence is a list of numbers in a pattern, and each number in the sequence is called a term. We will use "terms" and "numbers" interchangeably on this page.
So, what type of sequence is -40, -47, -54, -61? The sequence -40, -47, -54, -61 has a common difference of -7 between each term. We call this kind of sequence an arithmetic sequence. Below is an image illustrating the correlation between the arithmetic sequence -40, -47, -54, -61 and its common difference of -7.
Now, what is the next number in the sequence -40, -47, -54, -61? Below is the formula used to calculate the next number in an arithmetic sequence, such as -40, -47, -54, -61. The first term listed in the sequence is "a", the common difference is "d", and "n" is the nth term of the arithmetic sequence.
a + (n-1) × d = Next Term
As stated above, the common difference (d) between each term is -7. Furthermore, the next term in -40, -47, -54, -61 is the fifth term (5), and the first term is -40. When we enter these values into our formula, we get the following answer:
-40 + (5 - 1) × -7 = -68
Thus, the next number (term) in the sequence -40, -47, -54, -61 is -68. The tool below calculates the nth term of the sequence using the formula above. For example, type in 20 if you want the 20th term in the sequence -40, -47, -54, -61, or 100 if you want the 100th term in the sequence -40, -47, -54, -61.
Let's move on to our next question. What is the sum of the first 20 terms in the sequence -40, -47, -54, -61? We use the formula below to calculate the sum of the first n terms in an arithmetic sequence such as -40, -47, -54, -61. Again, note that the first term is "a", the common difference is "d", and "n" is the nth term of the arithmetic sequence.
(n/2)((2 × a) + (n - 1) × d) = Sum
When we enter the a, d, and n values into our formula, where n is equal to 20, we can calculate the sum of all numbers up through the 20th term in the sequence -40, -47, -54, -61, as seen below:
(20/2)((2 × -40) + (20 - 1) × -7) = -2130
Therefore, the sum of all numbers up through the 20th term in the sequence -40, -47, -54, -61 is -2130. Below is another tool we created to make these calculations easier for you. This tool can calculate the sum of any number of terms in the sequence -40, -47, -54, -61 using the formula mentioned above. For example, if you type in 50, then it will calculate the sum of the first 50 terms in the sequence -40, -47, -54, -61.
Arithmetic Sequence Calculator
Go here to learn more about arithmetic sequences using the best online Arithmetic Sequence Calculator.
Sequence -39, -46, -53, -60
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