1we can also discuss these problems here [1]
my query :
maths musing is a section in mathematics today(mtg magazine) which has some good iit related mathematics question
i have created a pdf of this section and uploaded here ...
http://www.scribd.com/doc/56405508/Math-Musing
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7 Answers
21dump those scrary notations and write completely and then cross-multiply.
put x = -r , and u will get Ar
eg- after cross-multiplying if u put x = -3 u will get A3= (-1)37! 3!
this way u will get Ar = (-1)rr!(10-r)! = (-1)r 10Cr10!
the rest part is easy
1lol ,manually calculate tho ho jayega
i meant ,is there any generalised way ???
1Hey ......... I am a new follower of Mathematics today .......... Can some1 pls tell me where I should send the Math Musing solutions to .......... Shall I e-mail or send via post ........... nd where should I send it ???????
1@Aditya .............. I don't think there's any generalised way to evaluate n!2n . The only possible result I think is that the given expression cannot be an integer .............