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If f(x) = x+ 1/x , x>0 then the greatest...

If `f(x) = x+ 1/x` , x>0 then the greatest value of f(x) is (a) -2 (b)0 (c) 3 (d) none of these

A

-2

B

0

C

3

D

none of these

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UNITED BOOK HOUSE-SET 8-EXERCISE
  1. CHOOSE the correct answer from the following alternative :if two rows ...

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  2. If f(2a-x)=-f(x), then overset(2a)underset(0)intf(x)dx =

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  3. If f(x) = x+ 1/x , x>0 then the greatest value of f(x) is (a) -2 (b)0...

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  4. If |veca|=4,|vecb|=2 sqrt3 and |vecaxxvecb|=12 then the angle between ...

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  5. the direction cosines of the line joining the points (1,2-3) and (-2,3...

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  6. If the probability of occurrence of an event is 5/8 then the odds in f...

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  7. A fair coin is tossed 99 times. Let X be the number of times head occu...

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  8. Evaluate : sec^2(tan^(-1)2)+cosec^2(cot^(-1)3).

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  9. Prove that , |[1,logx^y,logx^z],[logy^x,1,logy^z],[logz^x,logz^y,1]|=0

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  10. If A = [[2,2],[4,3]] show that AA^(-1)=I2where I2 is the unit matrix o...

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  11. f(x) = { (kx+1, x le pi),( cos x, x >pi):} If f(x) is continous at x =...

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  12. If ye^y=x prove that (dy)/(dx)= y/(x(1+y))

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  13. Evaluate: int e^x/x(x log x+1)dx

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  14. Find the integrating factor of the differential equation xlogx (dy)/(d...

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  15. Find the acute angle between the pair of straight lines whose directio...

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  16. Find the equation of the plane which passes through the points (1,2,3)...

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  17. A random variable X has the following probability distribution: ...

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  18. If cos^(-1)x+cos^(-1)y= theta, show that x^2-2xycos theta+y^2 = sin^2 ...

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  19. If A = [[cos alpha,sin alpha],[-sin alpha,cos alpha]] then prove that,...

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  20. If tan y = (tan x+sec x-1)/(tanx -sec x+1) show that (dy)/(dx) = 1/2

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