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    ช่วยด้วยค้าบ... คิดไม่ออกเลยค้าบ ใครเก่งเลขช่วยทีค้าบ T_T

    The infinite sequence of 2's and 3's
    2,3,3,2,3,3,3,2,3,3,3,2,3,3,2,3,3,2, ...
    has the property that, if one forms a second sequence that records the number of 3's between successive 2's, the result is the given sequence. Show that there exists a real number r such that, for any n, the n_th term of the sequence is 2 if and only if n = 1 + [rm] for some nonnegative interger m. (Note: [x] denotes the largest integer less than or equal to x.)

    จากคุณ : Cardcaptor (ผู้น่าสงสาร) - [ 22 ต.ค. 45 09:18:16 A: X: ]