Question:medium

The coefficient of the highest power of \(x\) in the expansion of \((x + \sqrt{x^2 - 1})^8 + (x - \sqrt{x^2 - 1})^8\) is:

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Always consider trigonometric and hyperbolic identities when dealing with complex binomial expressions to simplify calculation.

Updated On: Nov 26, 2025

64
128
256
512

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