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goldfiish [28.3K]
3 years ago
15

Please help with this! I will mark you as brainliest!

Mathematics
2 answers:
Svetllana [295]3 years ago
3 0

Answer:

an = 5 + (n-1)7

= 5+7n-7

= 7n-2

puteri [66]3 years ago
3 0

Answer:

a_{n} = 7n - 2

Step-by-step explanation:

The n th term of an arithmetic sequence is

a_{n} = a₁ + (n - 1)d

where a₁ is the first term and d the common difference

Here a₁ = 5 and d = 12 - 5 = 7, thus

a_{n} = 5 + 7(n - 1) = 5 + 7n - 7 = 7n - 2

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