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Consider the sequence of numbers a0, a1, a2, a3, . . . defined by the equation an = floorï¼n + (n/6)ï¼ +ceilï¼ n â (n/10)ï¼. So a0 = 0, a1 = 2, a2 = 4, a3 = 6, a4 = 8, . . . . Show that the statement âan = 2n â n â Nâ is false, and name the type of argument that you have used to do this.
type of argumentsï¼direct reasoningï¼contrapositive argumentï¼contradictionï¼counterexample
