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The condition that the two curves x=y^2,...

The condition that the two curves `x=y^2,xy=k` cut orthogonally is

A

`2k^2=1`

B

`8k^2=1`

C

`8k^3=1`

D

`2k^3=1`

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The correct Answer is:
B
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DIPTI PUBLICATION ( AP EAMET)-APPLICATIONS OF DIFFERENTIATION-EXERCISE 1B (TANGENT AND NORMAL)
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  3. The condition that the two curves x=y^2,xy=k cut orthogonally is

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  15. The length of the tangent of the curve 2x^2+3xy-2y^2=8 at (2, 3) is

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  19. The length of the normal to the curve y^2=x^3/(2a-x) at (a,a) is

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