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If x=log(a)bc,y=log(b)ca,z=log(c)ab, the...

If `x=log_(a)bc,y=log_(b)ca,z=log_(c)ab,` then the value of `(1)/(1+x)+(1)/(1+y)+(1)/(1+z)` will be

A

x+y+z

B

1

C

`ab+bc+ca`

D

abc

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WB JEE PREVIOUS YEAR PAPER-QUESTION PAPER 2009-MULTIPLE CHOICE QUESTIONS
  1. If agt0 and coefficients of x^5 and x^(15) in the expansion of (x^2+a/...

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  2. The value of ((1)/(log(3)12)+(1)/(log(4)12)) is

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  3. If x=log(a)bc,y=log(b)ca,z=log(c)ab, then the value of (1)/(1+x)+(1)/(...

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  4. Find the approximate value of sin62^(@), correct to 3 places of decima...

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  5. The rate of increase of a side of a square is 1 cm/sec. The rate of in...

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  6. The quadratic equation whose roots are three times the roots of 3ax^(2...

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  7. Smaller area enclosed by the circle x^(2) + y^(2) = 4 and the line x +...

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  8. In triangle ABC, a=2, b=3 and sinA=(2)/(3),then B is equal to

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  9. Let [x] denote the greatest integer less than or equal to x, then the ...

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  10. Let , m be the the smallest positive interger such that the coefficien...

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  11. The circles x^(2)+y^(2)-10x+16=0 and x^(2)+y^(2)=a^(2) intersect at tw...

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  12. int(2sin^-1x)/sqrt(1-x^2)dx=

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  13. The number of points on the line x+y=4 which are unit distance apart f...

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  14. The value of sqrt(2+sqrt(2+ sqrt(2….oo))) is

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  15. If f (x) = tan ^(-1) ((cos x- sinx)/(cos x+ sin x)) then the value of ...

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  16. If ab = 2a +3b, a gt0, b gt 0, then the minimum value of ab is-

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  17. If 2cos 3theta=1, then the value of theta is

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  18. For any complex number z, the minimum value of |z|+|z-1| is

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  19. The number of common tangent to two circle x ^(2) +y^(2) =4 and x^(2) ...

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  20. If C is a point on the line segment joining A (-3, 4) and B (2, 1) suc...

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