1.

Given that alpha and beta are the roots of the equation x^(2)=x+7. (i) Prove that (a) (1)/(alpha)=(alpha-1)/(7) and(b) alpha^(3)=8alpha+7. (ii) Find the numerical value of (alpha)/(beta)+(beta)/(alpha).

Answer»


ANSWER :(II) `(-15)/(7)`.


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