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masha68 [24]
3 years ago
13

Help plz consider the sequence {4,6,8,10...}Find the explicit formula that defines the sequence. A) an = 2n + 2 B) an = 2n + 4 C

) an = 4n + 2 D) an = 4n + 4
Mathematics
1 answer:
Alex777 [14]3 years ago
8 0

A

this is an arithmetic sequence whose n th term ( explicit formula) is

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

where d is the common difference and a_{1} the first term

here d = 10 - 8 = 8 - 6 = 6 - 4 = 2 and a_{1} = 4, hence

a_{n} = 4 + 2(n - 1 ) = 4 + 2n - 2 = 2n + 2 → A


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