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The number of common tangents to the cir...

The number of common tangents to the circles `x^2+y^2-x = 0 and x^2 + y^2 + x = 0` are

A

2

B

1

C

4

D

3

Text Solution

Verified by Experts

The correct Answer is:
D
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OBJECTIVE RD SHARMA-CIRCLES-Exercise
  1. Origin is a limiting point of a coaxial system of which x^(2)+y^(2)-6x...

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  2. A circle passes through the origin and has its center on y=x If it cut...

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  3. The number of common tangents to the circles x^2+y^2-x = 0 and x^2 + ...

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  4. Consider the circles x^2+(y-1)^2=9,(x-1)^2+y^2=25. They are such that ...

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  5. A circle touches the x-axis and also touches the circle with center (...

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  6. The circles x^(2)+y^(2)-4x-6y-12=0 and x^(2)+y^(2)+4x+6y+4=0

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  7. Write the equation of the unit circle concentric with x^2+y^2-8x+4y-8=...

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  8. The point (sintheta, costheta). theta being any real number, die insid...

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  9. The range of values of theta in [0, 2pi] for which (1+ cos theta, sin ...

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  10. The range of values of a for which the point (a, 4) is outside the cir...

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  11. IF (alpha, beta) is a point on the chord PQ of the circle x^(2)+y^(2)=...

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  12. If the point (lambda,lambda+1) lies inside the region bounded by the c...

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  13. The range of values of r for which the point (-5+r/sqrt2,-3+r/sqrt2) i...

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  14. The abscissa of the two points A and B are the roots of the equation x...

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  15. Three sided of a triangle have equations L1-=y-mi x=o; i=1,2a n d3. Th...

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  16. if y = mx is a chord of a circle of radius a and the diameter of the c...

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  17. 18. The straight lines joining the origin to the points of intersectio...

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  18. Find the locus of the point of intersection of tangents to the circle ...

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  19. If the chord of contact of tangents from a point (x1, y1) to the circl...

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  20. The circle S1 with centre C1 (a1, b1) and radius r1 touches externall...

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