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What expression represents this sequence where n is the position of the term in the sequence?
5, 11, 17, 23, 29, ...
A 5+6 (n + 1)
B 6+5 (n + 1)
5+6(n-1)
D 6+5 (n-1)

1 Answer

3 votes

Answer:

The expression that represents the given sequence is 5+6(n-1). Option C (not labeled).

Step-by-step explanation:

Arithmetic Sequences

In an arithmetic sequence, each term can be obtained by adding or subtracting a fixed number to the previous term. That fixed number is called the common difference.

We are given the following sequence:

5, 11, 17, 23, 29, ...

Each term is located in a position starting from n=1. Let's test each option:

A For n=1 we should have the first term (5). Substituting n=1 into the general equation: 5+6(n+1) = 5+6(1+1) = 5+12 = 17. Since the resulting term is not 5, this option is incorrect.

B For n=1, 6+5(n+1)= 6+5(2)=16. This option is incorrect.

C (not labeled) For n=1, 5+6(n-1)=5+6(1-1)=5+0=5. The first term is correct. Let's test for the second term (n=2):

5+6(2-1)=5+6=11. Correct. For n=3

5+6(3-1)=5+12=17. Correct.

We can see the terms are increasing by 6, and the given sequence is also increasing by 6. Thus, This option is correct.

D For n=1, 6+5 (n-1)=6+0=6. This option is incorrect.

User Simon Prickett
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