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int(x^(2)-1)/(x^(4)+3x^(2)+1)dx(xgt0) is...

`int(x^(2)-1)/(x^(4)+3x^(2)+1)dx(xgt0)` is

A

`tan^(-1)(x+(1)/(x))+c`

B

`tan^(-1)(x-(1)/(x))+c`

C

`log_(e)|(x+(1)/(x)-1)/(x+(1)/(x)+1)|+c`

D

`log_(e)|(x-(1)/(x)-1)/(x-(1)/(x)+1)|+c`

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WB JEE PREVIOUS YEAR PAPER-QUESTION PAPER 2017-Multiple Choice Questions
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  4. Let l=int(10)^(19)(sinx)/(1+x^(8))dx. Then.

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  5. Let l(1)=int(n)^(n)[x]dxandI(2)=int(0)^(n)|x|dx, where [x] and |x| are...

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  6. The value of lim(nrarroo)[(n)/(n^(2)+1^(2))+(n)/(n^(2)+2^(2))+...+(1)/...

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  7. The value of the integral int(0)^(1)e^(x^(2))dx

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  8. int(0)^(100)e^(x-[x])dx =

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  9. Solution of (x+y)^(2)(dy)/(dx)=a^(2) ('a' being a constant) is

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  10. The integrating factor of the first order differential equation x^(2)(...

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  11. In a G.P. series consisting of positive terms, Each term is equal to t...

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  12. If (log(5)x)(log(x)3x)(log(3x)y)=log(x)x^(3). Then y equals

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  13. The expression ((1+i)^(n))/((1-i)^(n-2)) equals

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  14. Let Z=x+iy where x and y are real. The points (x, y) in the X-Y plane ...

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  15. If p. q are odd integers. Then the roots of the equation 2px^(2)+(2p+q...

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  17. The number of all numbers having 5 digits, with distinct digits is

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  18. The greatest integer which divides (p+1)(p+2)(p+3)…(p+q) for all p in ...

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  19. Let (1+x+x^(2))^(9)=a(0)+a(1)x+a(2)x^(2)+.....+a(18)x^(18). Then

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  20. The linear system of equations {:(8x-3y-5z=0),(5x-8y+3z=0),(3x+5y-8z=0...

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