Mathematics 42 Online
OpenStudy (anonymous):

Here is an interesting sequence: 11, 21, 49, 107, 207, 361, X, Y, Z, ..... Can anyone show me what the values of X, Y, & Z are? In addition, can you calculate the 100th number in this sequence? Thanks for your help.

OpenStudy (bobbyleary):

\[2n ^{3}-3n ^{2}+5n+7\] When n=7, X = 581 When n=8, Y = 879 When n=9, Z = 1267 When n=100, \[N _{100}\] = 1970507

OpenStudy (anonymous):

Thanks so much for your help! I really appreciate this.

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