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12 March, 09:12

Find the first two terms of an arithmetic sequence are 5 and 7 what is the explicit formula for the sequence

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  1. 12 March, 11:01
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    D=2

    so

    an=a1 + (n-1) d

    =5 + (n-1) 2

    =5+2n-2

    =3+2n
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