Question

According to the rational root theorem -7/8 is a potential rational root of which function.
A.f(x)=24x^7+3x^6+4x^3-x-28
B.f(x)=28x^7+3x^6+4x^3-x-24
C.f(x)=30x^7+3x^6+4x^3-x-56
D.f(x)=56x^7+3x^6+4x^3-x-30

Answer 1

Possible roots are  p/q  where p is a factor of the  last number and q is a factor of the coefficient of the term of highest degree.

so since -7 is a factor of -28  and 8 is a factor of 24  its  choice A.