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multiple type correct:if a polynomial f(x)=4x^4-ax^3+bx^2-cx+5 (a,b,c belongs to R) has 4 positive real roots m,n,o,p such that m/2 + n/4 + o/5 + p/8 =1 then value of a is options:a- 20,b- 21, c- 19, d- 22

multiple type correct:if a polynomial f(x)=4x^4-ax^3+bx^2-cx+5  (a,b,c belongs to R) has 4 positive real roots m,n,o,p such that m/2 + n/4 + o/5 + p/8 =1 then value of a is options:a- 20,b- 21, c- 19, d- 22

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