good mtd mudit...although a rough procedure...a nice one......

and akku....superb soln. to that integration one....and about that vectors one.....ur soln is 16d²/(a²+4b²+9c²)......the answer is 8/7{options are 8/7 7/8 1 4}.....(the fact that these are unit vectors is perhaps missed out).....but i am jus. thinking...using this identity(cauchy-schwartz if i amnt mistaken) how do we make use of the fact that these vectors are coplanar.....neways i feel like kicking my self for missing out on that(identity)....neways rated u ppl....