Here we answer many questions about the sequence 70, 280, 1120, 4480... What type of sequence is 70, 280, 1120, 4480? What is the next number in the sequence 70, 280, 1120, 4480? What is the nth number in the sequence 70, 280, 1120, 4480? What is the sum of the first 10 terms in the sequence 70, 280, 1120, 4480? What is the sum of the first n numbers in the sequence 70, 280, 1120, 4480?
In addition, we will also give you the formula that is used to calculate the next number or the nth number in 70, 280, 1120, 4480, and the formula to calculate the sum of n numbers in 70, 280, 1120, 4480.
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 70, 280, 1120, 4480? The sequence 70, 280, 1120, 4480 has a common ratio of 4 between each term. We call this kind of sequence a geometric sequence. Below is an image illustrating the correlation between the geometric sequence 70, 280, 1120, 4480 and its common ratio of 4.
Now, what is the next number in the sequence 70, 280, 1120, 4480? Below is the formula used to calculate the next number in a geometric sequence, such as 70, 280, 1120, 4480. The first term listed in the sequence is "a", the common ratio is "r", and "n" is the nth term of the geometric sequence.
a × r^(n-1) = Next Term
As stated above, the common ratio (r) between each term is 4. Furthermore, the next term in 70, 280, 1120, 4480 is the fifth term (5), and the first term is 70. When we enter these values into our formula, we get the following answer:
70 × 4^(5-1) = 17920
Thus, the next number (term) in the sequence 70, 280, 1120, 4480 is 17920. 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 70, 280, 1120, 4480, or 100 if you want the 100th term in the sequence 70, 280, 1120, 4480.
Let's move on to our next question. What is the sum of the first 10 terms in the sequence 70, 280, 1120, 4480? We use the formula below to calculate the sum of the first n terms in a geometric sequence such as 70, 280, 1120, 4480. Again, note that the first term is "a", the common ratio is "r", and "n" is the nth term of the geometric sequence.
(a × (1 - r^n)) ÷ (1 - r) = Sum
When we enter the a, r, and n values into our formula, where n is equal to 10, we can calculate the sum of all numbers up through the 10th term in the sequence 70, 280, 1120, 4480, as seen below:
(70 × (1 - 4^10)) ÷ (1 - 4) = 24466750
Therefore, the sum of all numbers up through the 10th term in the sequence 70, 280, 1120, 4480 is 24466750. 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 70, 280, 1120, 4480 using the formula mentioned above. For example, if you type in 15, then it will calculate the sum of the first 15 terms in the sequence 70, 280, 1120, 4480.
Geometric Sequence Calculator
Go here to learn more about geometric sequences using the best online Geometric Sequence Calculator.
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