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n2 + 3n - 2

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Wiki User

14y ago
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Jason Huang

Lvl 2
1y ago

nth term = n*(n+2)+(n-2) when

1st term = 2; 2nd term = 8; 3rd term = 16; 4th term = 26; 5th term = 38; 6th term = 52

Step 1: look at n=3 and 4 and try to come up with a formula that is close

Step 2: first try multiplication for n=3 which should be 16 which is close to 3x5; for n=4 it should be 26 which is close to 4x6

Step 3: so the first part that works is n(n+2) but this only gets us close, not exact

Step4: for n=3 which is 16 is n(n+2)+1; for n=4 it is 26 which is n(n+2)+2

Step 5: so now we can try n(n+2)+(n-2). We test this for n=5 which is 38. 5(5+2)+(5-25) = 38. Test again for n=6 which is 52. 6(6+2)+(6-2) = 52...so all good.

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Ahmed Saleem

Lvl 3
12mo ago

The given sequence appears to follow a pattern. Let's analyze the differences between consecutive terms:

8 - 2 = 6

16 - 8 = 8

26 - 16 = 10

38 - 26 = 12

52 - 38 = 14

The differences between consecutive terms are increasing by 2 each time. So, to find the next term in the sequence, add 16 (the previous difference) and 2:

14 + 2 = 1614+2=16

Now, add this difference to the last term in the sequence:

52 + 16 = 6852+16=68

Therefore, the next term in the sequence is 68.

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Anonymous

Lvl 1
4y ago

87

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Q: What is the nth term of 2 8 16 26 38 52?
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