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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```
8 years ago

147 Points
```										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

Please feel free to post as many doubts on our discussion forum as you can. If you find any question Difficult to understand - post it here and we will get you the answer and detailed solution very quickly. We are all IITians and here to help you in your IIT JEE  & AIEEE preparation.  All the best.  Regards, Askiitians Experts Badiuddin
```
8 years ago
47 Points
```										Dear student Mr. 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

Please feel free to post as many doubts on our discussion forum as you can.
If you find any question Difficult to understand - post it here and we will get you the answer and detailed solution very quickly.

All the best.

Regards,
Pramod Kumar, IITR Alumni
```
7 years ago
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