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If $(m;, 1 / m;), i = 1, 2, 3, 4$ are concyclic points, then the value of $m_{1} m_{2} m_{3} m_{4},$ is

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Let the equation of the circle bex2+y2+2gx+2yy+c=0.If (m, 1 Im) Lies on this circle, thenm2+1m2+2gm+2f1m+c=0⇒ m4+2gm3+2fm+cm2+1=0This is a fourth degree equation in m having m1,m2,m3,m4 as its roots.∴ Product of the roots =1⇒m1m2m3m4=11=1

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If (m;, 1/m;),i = 1,2,3,4 are concyclic points, then the value of m1 m2 m3 m4, is

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If $(m;, 1 / m;), i = 1, 2, 3, 4$ are concyclic points, then the value of $m_{1} m_{2} m_{3} m_{4},$ is