If one root of \( A x^{3}+B x^{2}+C x+D=0, A \neq 0 \), is the arit... VIDEO
If one root of \( A x^{3}+B x^{2}+C x+D=0, A \neq 0 \), is the arithmetic mean of the other two roots, then the relation
\( \mathrm{P} \) \( 2 B^{3}+\lambda A B C+\mu A^{2} D=0 \) holds good. Then, the value of
W \( 2 \lambda+\mu \) is
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