# Justin

### Calc 2 help?

The differential x^n e^x^2 can be integrated using integration of parts if "n" is?

a. A positive integer

b. A positive odd integer

c. any positive integer

d. any whole number

This is giving me a hard time

1 AnswerMathematics2 months ago### URGENT CALC 2 HELP SOLID OF REVOLUTION?

This is an exercise problem in our calculus class and we were tasked to find the volume using the Washer method. I already sketched it and know what the figure will look like if revolved: like a coin on its side with a funnel-shaped hole through it. But the problem is I don't know what R (outer radius) and r (inner raidus) are. Is it R=x^2-2x+y=3, r=4-x?

1 AnswerMathematics2 months ago### Volume of Integration help?

Mathematics2 months ago### Calculus 2 help? I got 2.26 cubic units. ?

PROBLEM: The area bounded by y=lnx, x=e, and x-axis is revolved about the x-axis. Find the volume generated. (use circular disk method)

2 AnswersMathematics2 months ago### Why are green screens green? Why not other colors?

3 AnswersImmigration2 months ago### Calc help! The area bounded by y=lnx,x=e, and x-axis is revolved about the x-axis. Find the volume generated by using circular disk method?

My answer is at 143.71 rounded of to 2 decimal places. But I'm not really sure. A solution with an explanation is much appreciated. Thank you! :)

-Justin

1 AnswerMathematics2 months ago### Integrate ∫dx/(9+x^2)^2 using trigonometric substitution?

My answer is 1/54 (arctan (x/3) + 3x/9x^2)+C. But I'm not quite sure and I'm stuck with this practice problem. A solution with explanation is much appreciated. Thanks in advance.

-Justin

1 AnswerMathematics2 months ago