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Over [174]
2 years ago
12

Find a39 of the arithmetic sequence given a1 = -28 and d = -4.

Mathematics
1 answer:
seraphim [82]2 years ago
8 0

Hello !

a_{n} = a_{1} + (n - 1) \times d

a_{39} =  - 28 + (39 - 1) \times ( - 4) =  - 28 + 38 \times ( - 4) =  - 180

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