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If the length of the tangent from (1,2) to the circle `x^(2)+y^2+x+y-4=0 and 3x^(2)+3y^(2)-x-y-lambda=0` are in the ratio 4:3 then `lambda=`

A

`23/4`

B

`21/4`

C

`17/4`

D

`19/4`

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The correct Answer is:
B
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AAKASH SERIES-CIRCLES-PRACTICE EXERCISE
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  14. If a circle of radius 4 touches x-axis at (2,0) then its centre may be

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  16. Two circles touching both the axes intersect at (3,-2) then the coordi...

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  17. If two circles touching both the axes intersect at two points P and Q ...

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  19. The radius of the circle of least size that passes through (-2,1) and ...

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