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The positive value of lambda for which t...

The positive value of `lambda` for which the coefficient of `x^(2)` in the expression `x^(2) (sqrt(2) + (lambda)/(x^(2)))^(10)` is 720 is

A

`sqrt(5)`

B

4

C

`2sqrt(5)`

D

`3

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The correct Answer is:
B
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ALLEN-Solutions of Triangle & Binomial Theorem-EXERCISE (J-M)
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  16. If the coefficients of x^(2) and x^(3)are both zero, in the expansion ...

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  18. The cofficient of x^(18) in the product (1 + x) (1 - x)^(1) (1 + x + x...

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  19. If .^(20)C(1)+(2^(2)) .^(20)C(2) + (3^(2)).^(20)C(3) +......+(20^(2))....

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  20. The term independent of x in the expansion of ((1)/(60) - (x^(8))/(81)...

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