The sum of the co-efficients of all even degree terms in

Question:

The sum of the co-efficients of all even degree terms in $\mathrm{x}$ in the expansion of $\left(x+\sqrt{x^{3}-1}\right)^{6}+\left(x-\sqrt{x^{3}-1}\right)^{6},(x>1)$ is equal to:

  1. 32

  2. 26

  3. 29

  4. 24

Correct Option: , 4

Solution:

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