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first tell how [1/(r-1)! 1/(r-2)! and 1/(r-3)!] =e

i will rate u first teoll me how {(r-1)! and 1/(r-2)! and 1/(r-3)! }=e

ans is 3/2

the sum of series

1+ 2³/2! + 3³/3! ........... is

ans 5e

find the order of overall rkn

A2 + B2

2AB THE RKN FOLLOWS THE FOLLOWING MECHANISM

A2

A + A (FAST)

A + B2

AB +B (SLOW)

A+B

AB (fast)

Kinetics

http://www.prernaclasses.com/IITJEE2008Solutions.htm

rate me

on which site hav u got prerna class soln

For what value of x 2tan(-1)[2x+1]=cos(-1)[-x]

where tan(-1) is tan inverse x and cos(-1) =cos inverse x

also tell me that is tan(-1) [-1]=cos(-1) [-1/

2]

easy ques .just apply formula in vector form

cmon yaar

percentile was 88 to 93 percent in all full tests

everybody write and discuss marks in brilliant 10 th full test and let us discuss our rank through jee .i have an expert with me who can help us and tell our expected ranks

reply its urgent