pepper33 pepper33

01-05-2016
Mathematics

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which expression describes the nth term of the sequence of odd numbers that are greater than or equal to 3

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innes30 innes30

05-05-2016

The odd numbers can be given by:

2n - 1 Assuming n is starting at 1.

3 is the second odd number

2(2) - 1 = 4 - 1 =3

If we wish to start at at 3 then we only need to add 1 to the n:

2(n+1) -1 = 2n + 1.

And hence our expression.

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