Binomial TheoremHard
Question
Co-efficient of x5 in the expansion of (1 + x2)5 (1 + x)4 is :
Options
A.40
B.50
C.30
D.60
Solution
Co-efficient of x5 in (1 + x2)5 (1 + x)4 = 4C1 . 4C2 + 4C3 . 5C1 = 40 + 20 = 60
Create a free account to view solution
View Solution FreeMore Binomial Theorem Questions
The term independent of y in the binomial expansion of is -...Let R = (2√5 + 11)2n+1 and ƒ = R − [R], where [.] denotes the greatest integer function. The value of R...The greatest coefficient in the expansion of (1 + x)2n+2 is -...The sum of the coefficients of $x^{499}$ and $x^{500}$ in $(1 + x)^{1000} + x(1 + x)^{999} + x^{2}(1 + x)^{998} + \ldots...If n is a positive integer, then is :...