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four different point on circle whose coordinate is (mi,1/mi) then which one is ture
a. m1*m2*m3*m4=1 b.1/m1*1/m2*1/m3*1/m4 =4
Dear nishant
for simplicity let equation of circle is x2 +y2 =r2
put (m,1/m) point
so (m)2 +(1/m)2 =r2
simplify it
m4 -r2m2 +1=0
this equation has 4 roots m1,m2,m3,m4
product of all roots
m1*m2*m3*m4=1