If the roots of the equation $x^5-40 x^4-P x^3-R x-S=0$ are in geometric progression and the sum of the…
If the roots of the equation $x^5-40 x^4-P x^3-R x-S=0$ are in geometric progression and the sum of the reciprocals of the roots is 10 , then $|\mathrm{S}|=$