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For each ninN,2^(3n)-1 is divisible by...

For each `ninN,2^(3n)-1` is divisible by

A

7

B

8

C

6

D

16

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WB JEE PREVIOUS YEAR PAPER-QUESTION PAPER 2009-MULTIPLE CHOICE QUESTIONS
  1. The sum of all real of the equation |x-2|^(2)+|x-2|-2=0 is

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  2. If int(-1)^(4)f(x)dx=4 and int(2)^(4){3-f(x)}dx=7 then the value of in...

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  3. For each ninN,2^(3n)-1 is divisible by

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  4. The Rolle's theorem is applicable in the interval -1lexle1 for the fun...

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  5. The distance covered by a particle in t seconds is given by x=3+8t-4t^...

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  6. If agt0 and coefficients of x^5 and x^(15) in the expansion of (x^2+a/...

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

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

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

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

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

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

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

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

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

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

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

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

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