Prove that

Thanks a lot .

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- Sep 30th 2009, 05:04 AMthereddevilsproving this summation
Prove that

Thanks a lot . - Sep 30th 2009, 06:36 AMAmer
let prove it by induction okay

let

first see if n=1 and 2 true

and

at 1 the statement is true try when n=2

you will find it is true now suppose that n is true try n+1

......(*)

you begin with the RHS in (*) and finished with LHS in the (*) formula

so P_{n+1} is true the proof end - Sep 30th 2009, 08:38 AMGrandad