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14 lines
601 B
Plaintext
14 lines
601 B
Plaintext
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n n! n-i i
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(1 - t) B (t)= (1-t) ──────── (1-t) t
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i (n-i)!i!
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n+1-i (n+1)! n+1-i i
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= ───── ────────── (1-t) t
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n+1 (n+1-i)!i!
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k-i k! k-i i
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= ─── ──────── (1-t) t , where k = n + 1
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k (k-i)!i!
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k-i k
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= ─── B (t)
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k i
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