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Question Number 80881 by ajfour last updated on 07/Feb/20
v=−(2b+3cp)p3+bp2 3v2+2bpv+3cp+b1+bp2+cp3>0 b,c∈R,b<0 Anynon−zerorealvalueofp intermsofb,cobeyingabove condition?
Answered by ajfour last updated on 07/Feb/20
letp=−bc v=−b2c(3+b3c2)=−b2c3c2+b3 S=(b2c3c2+b3)2+2b2c(b2c3c2+b3)−2b letmetestit x3−49x+120=0 letx=u+v1+pu u3+Su+v3+bv+c1+bp2+cp3=0 ⇒u3+Su+T=0 D=T24+S327 u={−T2+D}1/3+{−T2−D}1/3 ........
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