If P(x)=x3−px2+qx−rP(x) = x^3 - px^2 + qx - rP(x)=x3−px2+qx−r has roots in geometric progression, which must be true?
q^3 = p^3 r
p^3 = q^3 r
p^3 r = q^3
q^3 = p r