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Marat540 [252]
3 years ago
9

Find the 120th term of the following sequence 7, 14, 21, ... a120 =

Mathematics
1 answer:
dlinn [17]3 years ago
4 0

Answer:

840

Step-by-step explanation:

There is a common difference d between consecutive terms, that is

d = 14 - 7 = 21 - 14 = 7

This indicates the sequence is arithmetic with n th term

a_{n} = a₁ + (n - 1)d

where a₁ is the first term and d the common difference

Here a₁ = 7 and d = 7 , thus

a_{120} = 7 + (119 × 7 ) = 7 + 833 = 840

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Step-by-step explanation:

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