What is the explicit formula for this sequence?

Mathematics

1 answer:

kati45 [8]3 years ago

6 0

<em>Greetings from Brasil...</em>

With the recursive formula, lets build the sequence:

A1 = 4

A2 = A1 - 7

A3 = A2 - 7

A4 = A3 - 7

A5 = A4 - 7

(...)

But pay attention to A3....

A3 = A2 - 7 but A2 = A1 - 7 , so rewriting A3

A3 = (A1 - 7) - 7 ⇒ A3 = A1 + 2.(- 7)

A4 = A3 - 7 ⇒ A4 = [(A1 - 7) - 7] - 7 = A1 + 3.(- 7)

A5 = {[(A1 - 7) - 7] - 7} - 7 = A5 + 4.(- 7)

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$P(X$

$P(z$

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Previous concepts

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