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if a polynomial f(x)=4x^4-ax^3+bx^2-cx+5 (a,b,c belongs to R) has 4 positive real roots r1,r2,r3,r4 such that r1/2+r2/4+r3/5+r4/8+1 the the value of a is (1)20 (2)21 (3)19 (4) 22. single 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 r1,r2,r3,r4 such that r1/2+r2/4+r3/5+r4/8+1 the the value of a is (1)20  (2)21  (3)19  (4) 22.  single correct

Grade:12th pass

1 Answers

Jitender Singh IIT Delhi
askIITians Faculty 158 Points
6 years ago
Ans:
Hello Student,
Please find the answer to your question below


f(x) = 4x4– ax3+ bx2– cx + 5
f(x) has four +ve real roots r1, r2, r3, r4
The second part of the problem is not complete.
Please rewrite the expression & carefully complete.
Also, clearly ask your question.

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