For this example, if n is a factor of t, t must be divisible by n. So each data can't give the relationship of the t and n. But if you use both of them: t/n = 3^n / 3^(n-2) = 3^2 Because 3^(n-2)*3^2 = 3^(n-2+2) = 3^n So t is divisible by n --> SUFFICIENT
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