Integral of x(ln x)^4: Steps & Solution

In summary, the integral of x(ln x)^4 can be expressed as x^2/x(ln x)^4 - x^2(ln x)^3 + 3/2 x^2 (ln x)^2 - 3/2 x^2(ln x) + 3/2 x +C. It is recommended to use a website such as www.integrals.com for faster and more accurate results. Also, differentiating the integral can help verify the solution.
  • #1
Quadruple Bypass
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Does the integral of x(ln x)^4 =
x^2/x(ln x)^4 - x^2(ln x)^3 + 3/2 x^2 (ln x)^2 - 3/2 x^2(ln x) + 3/2 x +C ?

Or did I do something completely wrong?
Sorry I didn't show my work, it would probably take me 30 mins to type it up here.
 
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  • #2
Why don't you try differentiating it and see? That's all we could do anyway, and we won't do your tedious work for you.
 
  • #3
Maple gives

1/2*x^2*ln(x)^4-x^2*ln(x)^3+3/2*x^2*ln(x)^2-3/2*x^2*ln(x)+3/4*x^2+C

and, in the future, try www.integrals.com (which in this case does not give the form of the answer your looking for.)
 
  • #4
LOL, i forgot about differentiating that. Damn, i was so tired after solving that my mind shut down. LOL THanks.

Thanks benorin too, my professor was telling us about some website that does that, and i forgot to write it down.
 
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FAQ: Integral of x(ln x)^4: Steps & Solution

1. What is the formula for calculating the integral of x(ln x)^4?

The formula for calculating the integral of x(ln x)^4 is ∫x(ln x)^4dx = (ln x)^5 + C.

2. What are the steps to solve the integral of x(ln x)^4?

The steps to solve the integral of x(ln x)^4 are:

  1. Use the formula ∫x(ln x)^n dx = (ln x)^(n+1)/(n+1) + C
  2. Substitute n = 4
  3. Integrate (ln x)^4 using the power rule
  4. Add a constant of integration, C

3. Can the integral of x(ln x)^4 be solved using u-substitution?

Yes, the integral of x(ln x)^4 can be solved using u-substitution. Let u = ln x, then du = 1/x dx. The integral becomes ∫u^4 du which can be easily solved using the power rule.

4. Is there a specific range of values for which the integral of x(ln x)^4 is defined?

Yes, the integral of x(ln x)^4 is defined for any positive value of x. However, if the value of x is negative, ln x is undefined and the integral cannot be solved.

5. Can the integral of x(ln x)^4 be used to solve real-world problems?

Yes, the integral of x(ln x)^4 can be used in various fields such as physics, engineering, and economics to solve real-world problems involving exponential growth or decay. It can also be used in calculating probabilities and areas under certain curves.

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