Find the value of a and b . (sqrt11 - ...

Find the value of `a` and `b` .
`(sqrt11 - sqrt7 ) / (sqrt 11 + sqrt 7) = a - b sqrt 77`
(i) `a = 9/2 , b = 1/2`
(ii) `a = 2/9, b = 2/3`
(iii) `a = 2/5, b = 1/2`
(iv) ` a = 9/2, b =5/2`

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