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Find the condition for the lines joining...

Find the condition for the lines joining the origin to the points of intersections of `5(x^(2)+y^(2)+bx+ay)=9 ab and (x)/(a)+(y)/(b)=1` are at right angles.

A

2b

B

`(b)/(2)`

C

b

D

both (1) and (2)

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The correct Answer is:
D
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AAKASH SERIES-PAIR OF STRAIGHT LINES-EXERCISE -II
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  6. The area of rectangle formed by the pair of lines xy+x+y+1=0 and xy+3x...

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  8. Find the condition for the lines joining the origin to the points of i...

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  9. The angle between pair of lines formed by joining the points of inters...

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  10. Show that the lines joining the origin to the two points of intersecti...

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  11. The angle between the lines joining the origin to the points of inters...

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  12. A line passing through (1,0) intersects the curve 2x^(2)+5y^(2)-7x=0 i...

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  13. If the lines joining the origin to the points of intersection of a lin...

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  14. All chords of a curve 3x^(2)-y^(2)-2x+4y=0 which subtends a right angl...

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  15. A pair of perpendicular straight lines passes through the origin and a...

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  16. The equation of the pair of lines joining the origin to the points of...

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  17. Let L be the line joing the origin to the point of interesection of th...

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  18. The lines joining the origin to the points of intersection of y=6x+8 w...

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  19. The line x+y=k meets the pair of straight lines x^(2)+y^(2)-2x-4y+2=0 ...

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  20. If two pairs of straight lines with combined equations xy + 4x - 3y -...

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