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Mathematics, 06.08.2019 06:10 Priskittles
Alex runs up a staircase with n steps, and can hop either 1, 2, or 3 steps at a time. count how many possible ways the child can run up the stairs. solution?
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Alex runs up a staircase with n steps, and can hop either 1, 2, or 3 steps at a time. count how many...
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