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20 March, 16:53

A sequence starting with 2.5 is shown below.

2.5, 5.0, 7.5, 10.0 ... n

which function represents the nth term of this sequence?

f (n) = n/2.5

f (n) = n+2.5

f (n) = n-2.5

f (n) = 2.5n

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Answers (1)
  1. 20 March, 17:11
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    This is an arithmetic sequence because each term is a constant difference from the previous term ...

    a (n) = a+d (n-1), a=2.5 and d=2.5

    a (n) = 2.5+2.5n-2.5

    a (n) = 2.5n
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