Question
. Choos e the n ext term in the s eque nce 2,5,11,20,32
Solution
4
(213 Votos)
Didier
Especialista · Tutor por 3 anos
Resposta
To find the next term in the sequence, we need to identify the pattern or rule that the sequence follows. Let's examine the differences between consecutive terms:1. Difference between the second term and the first term:
2. Difference between the third term and the second term:
3. Difference between the fourth term and the third term:
4. Difference between the fifth term and the fourth term:
We can observe that the differences between consecutive terms are increasing by 3 each time. This suggests that the sequence follows a quadratic pattern. To find the next term, we need to determine the formula for the nth term of the sequence.Let's assume the sequence follows a quadratic formula of the form
, where
,
, and
are constants.Using the first three terms of the sequence, we can set up a system of equations:For
:\(a(1)^2 + b(1) + c = 2\)
For
:\(a(2)^2 + b(2) + c = 5\)
For
:\(a(3)^2 + b(3) + c = 11\)
Solving this system of equations, we find that
,
, and
. Therefore, the formula for the nth term of the sequence is
.To find the next term in the sequence, we substitute
into the formula:
Therefore, the next term in the sequence is 40.