The condition that the roots of the equation x^3 - px^2 + qx - r = 0 be in GP is
a) pr = q
b) p^3r = q^3 c) p² r = q²
d) p²r=q
Solve for x, y, z the equations x + y + z = 5, yz + zx +xy = 7 and xyz = 3.
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=50.00000000000000000
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