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Mathematics, 28.01.2020 03:31 ladeshak5981
When i run up a staircase, my stride can carry me up 1, 2, or 3 steps at a time. in how many ways can i run up a 9-step staircase (given that my last stride lands me on the 9th step)?
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When i run up a staircase, my stride can carry me up 1, 2, or 3 steps at a time. in how many ways ca...
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