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Find the limits.$$\lim _{x \rightarrow+\infty}[\ln x-\ln (1+x)]$$
0
Calculus 1 / AB
Chapter 3
TOPICS IN DIFFERENTIATION
Section 6
L Hopital's Rule; Indeterminate Forms
Functions
Limits
Derivatives
Differentiation
Continuous Functions
Applications of the Derivative
University of Michigan - Ann Arbor
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here. We're starting with a limit as X goes to infinity, the natural log of X minus natural log of one plus X. And if we try to evaluate this limit right away noticed that we get infinity minus infinity. So we're gonna go ahead and rewrite this. Let's go ahead and use our log properties. Okay, so now we have just ah, natural log here, and we're going to go ahead and use our limit interchange property that says that we can interchange the natural log with the limit because the natural log is a continuous function. Okay. And now here were set up to use low petals. Role because we have on infinity over infinity, huh? Form. So let's go ahead and use lot. Hotels rule the derivative of the numerator. Pecs is one. And the derivative of the denominator is one. Okay, so we get natural. Look of one that's equal to zero. That's your answer.
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