Find the Third Term in the Sequence n²+1: Step-by-Step Solution

For the series n2+1 n^2+1

What is the third element?

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Step-by-step video solution

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00:00 Find the third term in the sequence
00:04 Substitute the term number (N) in the formula and solve
00:22 Calculate the power
00:33 And this is the solution to the question

Step-by-step written solution

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1

Understand the problem

For the series n2+1 n^2+1

What is the third element?

2

Step-by-step solution

To solve this problem, we'll follow these steps:

  • Step 1: Use the formula n2+1 n^2 + 1 to find the first element when n=1 n = 1 .
  • Step 2: Use the formula n2+1 n^2 + 1 to find the second element when n=2 n = 2 .
  • Step 3: Use the formula n2+1 n^2 + 1 to find the third element when n=3 n = 3 .

Let's work through each step:

Step 1: For the first element, substitute n=1 n = 1 into the formula:
12+1=1+1=2 1^2 + 1 = 1 + 1 = 2 .

Step 2: For the second element, substitute n=2 n = 2 into the formula:
22+1=4+1=5 2^2 + 1 = 4 + 1 = 5 .

Step 3: For the third element, substitute n=3 n = 3 into the formula:
32+1=9+1=10 3^2 + 1 = 9 + 1 = 10 .

Therefore, the third element of the series is 10.

3

Final Answer

10

Practice Quiz

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Is there a term-to-term rule for the sequence below?

18 , 22 , 26 , 30

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