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For any lambda in R, the locus x² + y² -...

For any `lambda in R,` the locus `x² + y² - 2lambdax - 2lambday +lambda²=0` touches the line

A

a)x=0

B

b)x=y

C

c)x+y=0

D

d)y=0

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A DAS GUPTA-Circles-EXERCISE
  1. The centre of a circle passing through the points (0, 0), (1, 0) and t...

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  2. If a circle passes through the point (a, b) and cuts the circle x^2 +y...

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  3. For any lambda in R, the locus x² + y² - 2lambdax - 2lambday +lambda²=...

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  4. Find the equation of the circle which touch the line 2x-y=1 at (1,1) a...

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  5. The circle for which the points (am^2,2am) and (a/m^2, (-2a)/m) are th...

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  6. The radius of the circle passing through the point (6,2) and having x ...

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  7. A circle passes through point (3, sqrt(7/2)) and touches the line-pai...

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  8. The angle between a pair of tangents from a point P to the circe x^2 +...

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  9. Let AB be a line segment of length 4 with A on the line y = 2x and B o...

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  10. The locus of the centre of a circle which touches externally the circl...

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  11. Prove that the centres of the circles x^2+y^2=1, x^2+y^2+6x-2y-1=0 and...

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  12. Find the equation of the circle which passes through the origin and...

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  13. The line x+3y=0 is a diameter of the circle x^2+y^2-6x+2y=0

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  14. The lines 2x+3y+19=0 and 9x+6y-17=0 , cut the coordinate axes at concy...

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  15. The area of an equilateral triangle inscribed in the circle x^2 + y^2-...

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  16. The range of values of a such that the angle theta between the pair of...

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  17. Let A-=(-1,0),B-=(3,0), and P Q be any line passing through (4, 1) hav...

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  18. (C) 2 45. Three concentric circles of which the biggest is x^2+ y^2= 1...

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  19. The equation of radical axis of two circles is x + y = 1. One of the ...

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  20. Find the locus of the centers of the circles x^2+y^2-2x-2b y+2=0 , whe...

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