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[" 45.A ball is dropped from a height "h...

[" 45.A ball is dropped from a height "h" .It rebounds from the ground a number of times.Given "],[" coefficient of restitution is "e," to what height does it go after "n" th rebounding? "],[[" (1) "ln/e^(n)," (2) "h/e^(2a)," (3) he "^(" n ")," (4) "he^(2" a ")]]

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