The mean of coefficients of x, x2, ....., x7 in the binomial expansion of (2 + x)9 is?
The number of rational terms in the expansion of (33/4 + 53/2)60?
Let S={\(a,b,c\)} be the sample space with the associated probabilities satisfying \(P(a)=2P(b)\) and \(P(b)=2P(c).\)Then the value of \(P(a)\) is
Which are the non-benzenoid aromatic compounds in the following?
Car P is heading east with a speed V and car Q is heading north with a speed \(\sqrt{3}\). What is the velocity of car Q with respect to car P?