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What is the common difference between consecutive terms in the following arithmetic sequence?

[tex]\[ -11, -8, -5, -2, 1, \ldots \][/tex]

A. 3
B. 5
C. -3
D. 7


Sagot :

To determine the common difference between consecutive terms in the given arithmetic sequence [tex]\(-11, -8, -5, -2, 1, \ldots\)[/tex], we need to analyze the differences between each pair of consecutive terms.

An arithmetic sequence has a constant difference, called the common difference, between each pair of consecutive terms. Let's find this common difference step-by-step:

1. Identify the sequence terms:
[tex]\[ -11, -8, -5, -2, 1, \ldots \][/tex]

2. Calculate the difference between the first and second terms:
[tex]\[ -8 - (-11) = -8 + 11 = 3 \][/tex]

3. Calculate the difference between the second and third terms:
[tex]\[ -5 - (-8) = -5 + 8 = 3 \][/tex]

4. Calculate the difference between the third and fourth terms:
[tex]\[ -2 - (-5) = -2 + 5 = 3 \][/tex]

5. Calculate the difference between the fourth and fifth terms:
[tex]\[ 1 - (-2) = 1 + 2 = 3 \][/tex]

We can observe that the difference between each pair of consecutive terms is consistently 3. Hence, the common difference for the given arithmetic sequence is:

[tex]\[ \boxed{3} \][/tex]
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