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If A=∑n=1∞1n(n+1)(n+2)(n+3)(n+4)(n+5), A = \displaystyle \sum_{n=1}^\infty \frac {1}{n(n+1)(n+2)(n+3)(n+4)(n+5)} , A=n=1∑∞n(n+1)(n+2)(n+3)(n+4)(n+5)1, what is the value of 1A?\frac {1}{A}?A1?
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