Integrate the function $\frac{\ln\left(x\right)}{x}$ from $1$ to $\infty $

Step-by-step Solution

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Final answer to the problem

The integral diverges.

Step-by-step Solution

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  • Integrate by partial fractions
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  • Integrate using tabular integration
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  • Weierstrass Substitution
  • Integrate using trigonometric identities
  • Integrate using basic integrals
  • Product of Binomials with Common Term
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We can solve the integral $\int\frac{\ln\left(x\right)}{x}dx$ by applying integration by substitution method (also called U-Substitution). First, we must identify a section within the integral with a new variable (let's call it $u$), which when substituted makes the integral easier. We see that $\ln\left(x\right)$ it's a good candidate for substitution. Let's define a variable $u$ and assign it to the choosen part

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$u=\ln\left(x\right)$

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Learn how to solve improper integrals problems step by step online. Integrate the function ln(x)/x from 1 to infinity. We can solve the integral \int\frac{\ln\left(x\right)}{x}dx by applying integration by substitution method (also called U-Substitution). First, we must identify a section within the integral with a new variable (let's call it u), which when substituted makes the integral easier. We see that \ln\left(x\right) it's a good candidate for substitution. Let's define a variable u and assign it to the choosen part. Now, in order to rewrite dx in terms of du, we need to find the derivative of u. We need to calculate du, we can do that by deriving the equation above. Isolate dx in the previous equation. Substituting u and dx in the integral and simplify.

Final answer to the problem

The integral diverges.

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Function Plot

Plotting: $\frac{\ln\left(x\right)}{x}$

Main Topic: Improper Integrals

An improper integral is the limit of a definite integral as an endpoint of the interval(s) of integration approaches either a specified real number that is not part of the function's domain, or infinity.

Used Formulas

See formulas (2)

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