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[obm-l] Duvidas



05                   

05.         Uma vez, para tod o x 1 e n Î N, vale a desigualdade xn > n(x - 1). Temos como conseqüência que, para 0 <             x  <  1 e    n Π   N,              tem-se:            se:                                                                                                                                                                        

a) xn-      A) xn-1 < [(n + 1)(1 + x)]-1            b) xn-1 < [n2(1 - x)]-1        c) xn-1 < [(n + 1)(1 - x)]-1      D) xn-1 < [n(1 - x)]-1  

                      E) xn-1 < [n(1 + x)]-1