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blsea [12.9K]
3 years ago
7

Find the 75th term of the arithmetic sequence -1, 15, 31, ...−1,15,31,...

Mathematics
1 answer:
Readme [11.4K]3 years ago
3 0

Answer:

1183

Step-by-step explanation:

Common difference:

d = 31 - 15 = 16

nth term:

a_n = a_1 + (n - 1)d

Here, a_1 = -1

a_{75} = -1 + (75 - 1)(16)

a_{75} = 1183

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