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[" 24.) Given "alpha" and "beta" are the...

[" 24.) Given "alpha" and "beta" are the roots of the quadratic equation "x^(2)-4x+k=0(k!=0)." If "],[a beta,alpha beta^(2)+alpha^(2)beta,alpha^(3)+beta^(3)" are in geometric progression,then the value of "k" is "]

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