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4-2.Quadratic Equations and Inequations
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The sum of all non-integer roots of the equation $x^5-6 x^4+11 x^3-5 x^2-3 x+2=0$ is
A
$6$
B
$-11$
C
$-5$
D
$3$
(KVPY-2017)
Solution
(d)
Given,$x^5-6 x^4+11 x^3-5 x^2-3 x+2=0$
$(x-1)(x-2)\left(x^3-3 x^2+1\right)=0$
The sum of non-integer roots are sum of roots of equation
$x^3-3 x^2+1=0$ i.e. 3
Standard 11
Mathematics