The sixth term in the expansion of x1/3+y1/2n  if the binomial coefficient of the third term form the end is 45, is

Binomial coefficients of the third term from the end in the expansion of x1/3+y1/2n, is nC2=45⇒n(n−1)−90=0⇒n=10∴ Sixth term in the expansion of x1/3+y1/2n is nC5x1/3n−5y1/25=252x5/3y5/2