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the number of values of a for which the...

the number of values of a for which the pair of lines represented by `3ax^(2) +5xy +(a^(2) -2)y^(2) = 0 ` are at right angles to each other , is

A

2

B

1

C

infinitely many

D

0

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The correct Answer is:
A
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TS EAMCET PREVIOUS YEAR PAPERS-AP EAMCET ENGINEERING ENTRANCE EXAM ONLINE QUESTION PAPER 2019 (SOLVED)-Mathematics
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  4. If the pair of lines joining the origin and the points of intersection...

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  5. If the lines x + 2y-5=0 and 2x - 3y +4 = 0 lie along diameters of ...

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  6. Given that a gt 2b gt 0 and that the line y = mx - b sqrt(1 + m^(...

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  7. Two circles each of radius 5 units touch each other at (1,2) and 4x ...

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  8. If the angle between the circles x^(2) +y^(2) +4x - 5 = 0 and x^(2) +...

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  9. The equation of a circle passing through the points of intersection of...

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  10. The normal at a point on the parabola y^(2) = 4x passes through (5,0...

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  11. The equation of the normal to the parabola y^(2) = 4 x which is per...

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  12. Let P be any point on the ellipse 7x^(2) +16y^(2) = 112 , S be a foc...

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  13. Tangents are drawn to the ellipse x^(2)/9+y^(2)/5=1 at the ends of lat...

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  14. A hyperbola with centre at (0,0) has its transverse axis along X - ax...

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  15. In a triangle ABC , if the mid-points of sides AB, BC, CA are (3,0,0)...

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  16. The angle between a line with direction ratios 2,2,1 and the line joi...

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  17. The equation of the plane in normal form which passes through the poi...

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  18. If alpha = lim(x to 0) (x*2^(x)-x)/(1 - cos x) and beta= lim(x to 0) (...

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  20. lim(x -> infty) [sqrt(x^(2) +ax +b)-x](a lt 0 lt b)

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