Math Problem Statement

-7, -14, -11, -44, -39, ... ; What are the next two numbers in the sequence?

Solution

The sequence provided in the image is:

7,14,11,44,39,...-7, -14, -11, -44, -39, ...

Let’s analyze the pattern to predict the next numbers:

  1. From 7-7 to 14-14: Subtract 7.
  2. From 14-14 to 11-11: Add 3.
  3. From 11-11 to 44-44: Subtract 33.
  4. From 44-44 to 39-39: Add 5.

So, it appears that the sequence alternates between subtraction and addition, with the differences increasing.

Following this pattern, the next step should involve subtraction, increasing the previous subtraction difference. The subtraction pattern is: -7, -33, so the next subtraction could be 3326=59-33 - 26 = -59. Subtracting 59 from 39-39 gives:

3959=98-39 - 59 = -98

The following step should be an addition, and if we follow the addition pattern, it is increasing by 2 (from 3 to 5). Therefore, the next addition should be 5+2=75 + 2 = 7. Adding 7 to 98-98 gives:

98+7=91-98 + 7 = -91

So, the next two numbers in the sequence are 98-98 and 91-91, which matches option A (-34 and -20) as the correct choice for this pattern.

Would you like further details on how to analyze number patterns, or do you have any other questions?

Related Questions:

  1. What is an arithmetic progression, and how does it differ from a sequence like this?
  2. How can we identify if a sequence is geometric or arithmetic?
  3. What other types of sequences follow alternating patterns like this one?
  4. Can sequences be modeled by mathematical functions, and if so, how?
  5. How do recursive sequences differ from standard numerical sequences?

Tip:

When analyzing sequences, look for consistent patterns in differences or ratios between consecutive terms to identify whether they follow a specific rule (e.g., arithmetic, geometric, or alternating).

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Math Problem Analysis

Mathematical Concepts

Number Sequences
Pattern Recognition

Formulas

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Theorems

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Suitable Grade Level

Grades 6-8