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int(0)^(oo) e^(-mx) x^(7) dx is...

`int_(0)^(oo) e^(-mx) x^(7) dx ` is

A

`(lfloorm)/(7^m)`

B

`(lfloor7)/(m^7)`

C

`(lfloorm)/(7^(m+1))`

D

`(lfloor7)/(m^8)`.

Text Solution

Verified by Experts

The correct Answer is:
D
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PREMIERS PUBLISHERS-APPLICATIONS OF INTEGRATION-PROBLEMS FOR PRACTICE (CHOOSE THE CORRECT ANSWER) :
  1. int(0)^((pi)/(2))(dx)/(1+sqrt(tanx)) is :

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  2. int(0)^((pi)/(2))sin^5 xdx=.

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  3. int(0)^(oo) e^(-mx) x^(7) dx is

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  4. int(0)^((pi)/(2)) ( sin x - cos x )/( 1+ sin x cos x ) dx = "............

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  5. int(0)^((pi)/(2)) ( sin x - cos x )/( 1+ sin x cos x ) dx = "............

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  6. the volume generated when the region bounded by y=x, y=1, x=0, is rota...

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  7. The area bounded by the parabola x^2=y and is latus rectum is :

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  8. int(0)^(prop) x^(6) e^(-(x)/(2))dx is :

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  9. The volume of solid obtained by revolving (x^2)/(9)+(y^2)/(16)=1 about...

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  10. int(0)^((pi)/( 4)) cos^(3) 2x dx = "….........."

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  11. The value of int(0)^(pi) sin^(4) x dx is

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  12. int(0)^((pi)/(2)) e^(2x) cos xdx is :

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  13. int(0)^((3)/(2)) sqrt(9-4x^2)dx=.

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  14. int(0)^((pi)/(2)) sin^7 xdx is :

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  15. The area of the region bounded by y=x^2-5x+4,x=2,x=3 and the x axis is...

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  16. Find the area of the region bounded by x^2=36y y axis y=2 and y=4.

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  17. Find the common area of x^2=y and y^2 =x.

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  18. int(-2)^(2)(2-x)^2dx is :

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  19. The volume of the solid formed by revolving the area of the circle x^2...

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  20. The volume generated by the region bounded by the curve y=sqrt(x) and ...

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