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Travka [436]
2 years ago
10

Given: F3 = 5 k + 515 g F4 = 945k - 713 g ; find F20

Mathematics
1 answer:
Alisiya [41]2 years ago
8 0

9514 1404 393

Answer:

  F20 = 15985k -20361g

Step-by-step explanation:

If we assume F3 and F4 are the third and fourth terms of an arithmetic sequence, the common difference is ...

  d = F4 -F3 = (945k -713g) -(5k +515g)

  d = 940k -1228g

Then the 20th term is ...

  F20 = F3 +(20 -3)d = (5k +515g) +17(940k -1228g)

  F20 = 15985k -20361g

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