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Igoryamba
3 years ago
8

Find a1 for the arithmetic sequence's 21st term is 400 is 400 and it's common difference is 5​

Mathematics
1 answer:
AnnyKZ [126]3 years ago
4 0

Answer:

8,395

Step-by-step explanation:

21 x 400 = 8,400

is = x

8, 400 - 5 = 8,395

difference = -

Brainlist Pls!

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