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Effectus [21]
3 years ago
11

What is the 8th term of the arithmetic sequence with a first term of 7 and a common difference of -3?

Mathematics
2 answers:
lawyer [7]3 years ago
6 0

Answer:

-17 is the answer.

Step-by-step explanation:

Your starting point is 7.

Next you know that it goes down by 3.

Finally you are looking for the 8th term.

So in all it would look like this. -3(8) + 7

torisob [31]3 years ago
4 0

Answer:

a_{8} = - 14

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 = 7 and d = - 3, thus

a_{8} = 7 + (7 × - 3) = 7 - 21 = - 14

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