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Consider the sequence:

3, 8, 13, 18, 23, ...



The recursive formula for this sequence is:

an = an-1 + 5

In a COMPLETE sentence, explain what an and an-1 represent in the formula. Then find a8 . What do you need to know in order to find a8 ?

Respuesta :

znk

Answer:

Here's what I get  

Step-by-step explanation:

aₙ is the nth term in the arithmetic sequence and aₙ₋₁ is the term that comes immediately before it in the sequence.

We know that a₅ = 23. To find a₈, we must find a₆ and a₇.

a₅ = 23

a₆ = a₅ + 5 = 23 + 5 = 28

a₇ = a₆ + 5 = 28 + 5 = 33

a₈ = a₇ + 5 = 33 + 5 = 38

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