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mathematics sequence and series

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You hv been given n=2 an Tn=5,n=3 an Tn=7,n=4 an Tn=9,n=7 an Tn=A,n=10 an Tn=21,n=B an Tn=153 determine A and B help please

  • mathematics sequence and series -

    so, we have
    n Tn
    2 5
    3 7
    4 9
    7 A
    10 21
    B 153

    From the first three terms, it looks like

    Tn = 2n+1

    T10 also fits this, so we have

    7 15
    76 153

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