IIT JEE , AIEEE Forum - Mathematics , Analytical Geometry

Discussion Response Post to: a good question

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23 Mar 2007 18:44:03 IST

Subject: Re:a good question

rajat (284)

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hey . plzz. tell me y is my method wroong

(x^2 + 1 + 1/x^2)^n

Tr+1 = C(n,r)(x^2 + 1/x^2)^r

now (x^2 + 1/x^2)^r has r+1 terms.

=> Tr+1 has r+1 terms

total terms are by varying r from 0 to n-1

1 + 2 +3.........n =>n(n+1)/2

light travels the fastest ??? NO
wherever light goes it always finds that darkness has already got there

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