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let alpha be the constant term in the bi...

let `alpha `be the constant term in the binomial expansion of `(sqrtx-(6)/x^(3/2))^n` , `nle 15`. If the sum of the coefficients of the remaining terms in the exansion is `649` and the coefficient of `x^(-n)` is `lambda alpha `,then `lambda` is equal to ___.

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