1.

The set of all real values of lambdafor which exactly two common tangents can be drawn to the circlex^(2) +y^(2) -4x -4y +6=0and x^(2) +y^(2) -10 x-10 y +lambda =0 is the interval

Answer»

`( 12,32) `
` ( 18, 42) `
` ( 12,24)`
`( 18, 48 )`

ANSWER :B


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