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If the constant term in the binomial exp...

If the constant term in the binomial expansion of `((x^(5/2))/(2)-(4)/(x^(l)))^(9)` is `-84` and the coefficient of `x^(-3l)` is `2^(alpha)beta` where `beta<0` is an odd number,then `abs(alpha l-beta)` is equal to

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JEE MAINS PREVIOUS YEAR-JEE MAINS 2023 JAN ACTUAL PAPER-Question
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