If the roots of \( x^{3}+3 p x^{2}+3 q x+y=0 \) are in harmonical progression, shew that \( 2 q^...
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0If the roots of \( x^{3}+3 p x^{2}+3 q x+y=0 \) are in harmonical progression, shew that \( 2 q^{3}=r(3 p q-r) \).
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