Math Problem Statement

Use the difference table to predict the next term in the sequence.

Solution

Let's go through each sequence to predict the next term using the difference table method. We will calculate the differences between consecutive terms and use this pattern to find the next term.

1) Sequence: 2, 6, 22, 56, 114, 202, _____

  • Differences between terms:
    6 - 2 = 4
    22 - 6 = 16
    56 - 22 = 34
    114 - 56 = 58
    202 - 114 = 88

  • Second differences:
    16 - 4 = 12
    34 - 16 = 18
    58 - 34 = 24
    88 - 58 = 30

  • Third differences (constant):
    18 - 12 = 6
    24 - 18 = 6
    30 - 24 = 6

Since the third difference is constant, we add 36 to 88 to find the next difference:
88 + 36 = 124

Now, add this difference to the last term:
202 + 124 = 326

The next term is 326.


2) Sequence: 3, 9, 15, 21, 27, _____

  • Differences between terms:
    9 - 3 = 6
    15 - 9 = 6
    21 - 15 = 6
    27 - 21 = 6

Since the first differences are constant, this is an arithmetic sequence with a common difference of 6.
The next term will be:
27 + 6 = 33


3) Sequence: 2, 6, 12, 20, 30, 42, _____

  • Differences between terms:
    6 - 2 = 4
    12 - 6 = 6
    20 - 12 = 8
    30 - 20 = 10
    42 - 30 = 12

The difference increases by 2 each time.
The next difference will be:
12 + 2 = 14

Now, add this to the last term:
42 + 14 = 56


4) Sequence: 6, 11, 18, 27, 38, 51, _____

  • Differences between terms:
    11 - 6 = 5
    18 - 11 = 7
    27 - 18 = 9
    38 - 27 = 11
    51 - 38 = 13

The difference increases by 2 each time.
The next difference will be:
13 + 2 = 15

Now, add this to the last term:
51 + 15 = 66


5) Sequence: 1, 8, 21, 40, 65, 96, _____

  • Differences between terms:
    8 - 1 = 7
    21 - 8 = 13
    40 - 21 = 19
    65 - 40 = 25
    96 - 65 = 31

The difference increases by 6 each time.
The next difference will be:
31 + 6 = 37

Now, add this to the last term:
96 + 37 = 133


Let me know if you'd like further details on any step! Here are 5 related questions:

  1. What is the general formula for an arithmetic sequence?
  2. How do we determine if a sequence is quadratic based on differences?
  3. What are higher-order differences in sequences and their importance?
  4. Can all sequences be predicted using difference tables?
  5. How can geometric sequences be handled differently from arithmetic ones?

Tip: Sequences with constant third differences often indicate a cubic polynomial relationship!

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Math Problem Analysis

Mathematical Concepts

Arithmetic Sequences
Difference Tables
Polynomial Sequences

Formulas

First Difference: D(n) = a_n+1 - a_n
Second Difference: D2(n) = D(n+1) - D(n)
General Polynomial Sequence

Theorems

Constant differences imply linear, quadratic, or cubic relations.
Difference table analysis for sequence prediction

Suitable Grade Level

Grades 8-10