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

4 years ago

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Answers : (1)

                    

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





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