The positive value of λ for which the co-efficient of x2 in the expression \({x^2}{\left( {\sqrt x + \frac{\lambda }{{{x^2}}}} \right)^{10}}\) is 720 is:

The positive value of λ for which the co-efficient of x2 in the expre

1.	The positive value of λ for which the co-efficient of x2 in the expression \({x^2}{\left( {\sqrt x + \frac{\lambda }{{{x^2}}}} \right)^{10}}\) is 720 is:
A.	4
B.	\(2\sqrt 2 \)
C.	√5
D.	3
Answer» B. \(2\sqrt 2 \)