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If the roots of the equation 5x^2 - 7x ...

If the roots of the equation ` 5x^2 - 7x - k = 0 `are reciprocal to one another, then which of the following is the value of k?

A

a)-5

B

b)-1/5

C

c)5

D

d)1/5

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  2. State which of the following is the value of (1+i+2i^2+i^3+i^4)[given ...

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  3. If the roots of the equation 5x^2 - 7x - k = 0 are reciprocal to one ...

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  8. The 12th term of the scries-n,(n -1), (n - 2),….

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  9. If 5.x, 405 are in G.P, then which of the following is the value of x?

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  10. The perpendicular distance of the straight line 3x + 4y + 15 = 0 from ...

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  12. The distance between the two-parallel lines 3x + 4y + 9 =0and 3x+4y+7=...

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  15. If the equation x^2/(4-m)+y^2/(m-7)+1=0represents an ellipse then

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  16. The length of the latus rectum of the hyperbola 9x^2-25y^2=225is

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  17. The points (5, 2, 4), (6, -1, 2) and (8,-7, k) are collinear if k =

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  18. If | x | le y then

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  19. If it(xrarr3)(ax^2-beta)/(x-3)=12,then

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  20. 5f(x)+3f(1/x)=x+2 and y=xf(x),then dy/dx=

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