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19-07-2016
Mathematics

contestada

given the polynomial f(x)=8x5−4x3 6x 15
what one of the following is a possible rational root?

a. 5 / 6
b. 4 / 14
c. 7 / 5
d. 5 / 4

Respuesta :

19-07-2016

Hello,

Answer D 5/4

since div 15={1,3,5,15}
and div 8={1,2,4,8}
posiible rational root is a*b where a∈div 15 and b∈div 8

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