Find an expression for the number in the nth term pattern of the sequence.
4 , 7 , 12, 19
1 answer:
Answer:
n^2 + 3.
Step-by-step explanation:
4 7 12 19
Differences are 3 5 7 so this a quadratic sequence.
2nd difference = 2 2
So the first part of the expression is n^2
Terms: 4 7 12 19
n^2 1 4 9 16
Difference = 3 3 3 3 3
So the answer is n^2 + 3.
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slope/y-int from = y =mx+b
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