3 years ago

Need answer ASAP *MARKING BRAINLIEST

Mathematics

1 answer:

NikAS [45]3 years ago

8 0

Answer:

an = 4n +5

Step-by-step explanation:

First we need to find a common difference

d = a2-a1 = 13-9 = 4

The formula for an

an =a1+d(n-1)

an = 9 + 4(n-1)

Distributing

an = 9+4n-4

Combine like terms

an = 4n +5

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