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If log(7)2 = lambda, then the value of l...

If `log_(7)2 = lambda`, then the value of `log_(49) (28)` is:

A

`(2lambda +1)`

B

`(2lambda +3)`

C

`1/2(2lambda +1)`

D

`2(2lambda + 1)`

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WB JEE PREVIOUS YEAR PAPER-QUESTION PAPER 2011-MULTIPLE CHOICE QUESTIONS
  1. If omega ne 1 is a cube root of unity, then the sum of the series S...

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  2. If log(3)x + log(3)y =2 + log(3)2 and log(3)(x+y) =2, then

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  3. If log(7)2 = lambda, then the value of log(49) (28) is:

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  4. The sequence log a, log (a^(2)/b), log (a^(3)/b^(2)) is:

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  5. If in a triangle ABC, sin A, sin B, sin C are in A.P, then

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  6. |{:(a-b, b-c, c-a),(b-c, c-a, a-b),(c-a, a-b, b-c):}|=

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  7. The area enclosed between y^(2) = x and y=x is:

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  8. Let f(x) = x^(3) e^(-3x) , x gt 0. Then the maximum value of f(x) is:

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  9. The area bounded by y^(2) = 4x and x^(2) = 4y is:

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  10. The acceleration of a particle starting from rest moving in a straight...

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  11. The solution of: (dy)/(dx) = y/x + tan y/x is:

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  12. Integrating Factor (I.F). Of the differential equation: (dy)/(dx) -...

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  13. The differential equation of y=ae^(bx) (a & b are parameters) is:

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  14. The value of: lim(n to infty) sum(r=1)^(n) r^(2)/(r^(3) + n^(3)) is:

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  15. The value of int(0)^(pi) sin^(50)x cos^(49) x dx is:

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  16. int 2^(x) [f'(x) + f(x) (log 2)] dx is

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  17. Let f(x) = tan^(-1) x. Then f'(x) + f''(x) is =0, when x is equal to:

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  18. If y= tan^(-1) ((sqrt(1+x^(2))-1)/x) , then y'(1)=

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  19. The value of lim(x to 1) (x+x^(2)+ ….. + x^(n) -n)/(x-1) is:

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  20. lim( x to 0) (sin (pi sin^(2)x))/x^(2) =

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