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```				   IF THE MAXIMUM & MINIMUM VALUE OF -
y= x2-3x+c / x2+3x+c  ARE 7 AND 1/7 ,THEN VALUE OF c IS ...?
```

7 years ago

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```										Dear rahul
y= x2-3x+c / x2+3x+c
cross multiply and simplify
x2(y-1) +x(3y+3) +c(y-1)=0
this equation has a real value so discrimnent will be ≥ o
(3y+3)2 -4c(y-1)(y-1)≥0
simplyfy
{y(3+2√c) -(2√c-3)}{y(2√c -3) -(3+2√c)}≤0
(2√c-3)/  (3+2√c) ≤  y≤(3+2√c)/(2√c -3)
compair with given condition
(3+2√c)/(2√c -3) =7
c= 9/4
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.

```
7 years ago

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