{[ promptMessage ]}

Bookmark it

{[ promptMessage ]}

section6.1

# section6.1 - Math 2B Dr C Famiglietti Section 6.1 The...

This preview shows pages 1–3. Sign up to view the full content.

Math 2 B Dr. C. Famiglietti ************************************************************************ Section 6.1: The Natural Logarithm y = ln x is the natural logarithmic function (which means e y = x , where e is a constant approximately equal to 2.71828…). The graph of y = ln x is shown below and has the following characteristics: Domain: 0, ( ) Range: −∞ , ( ) Increasing throughout its domain Concave downward Passes through 1,0 ( ) since ln1 = 0 lim x →∞ ln x = lim x 0 + ln x = −∞ Properties of the natural logarithmic function ( a and b are real numbers greater than 0 and r is a rational number) 1. ln1 = 0 2. ln e = 1 3. ln ab ( ) = ln a + ln b 4. ln a b = ln a ln b 5. ln a r ( ) = r ln a Derivative of the natural logarithmic function d dx ln x ( ) = 1 x Combine with the Chain Rule to obtain: d dx ln u ( ) = 1 u du dx , where u = g x ( ) Corresponding antiderivative 1 x dx = ln x + c

This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document
Logarithmic differentiation (a technique of differentiation which is used to differentiate functions of the form f x ( ) [ ] g x ( ) and is helpful when differentiating functions with multiple products, quotients and/or exponents) 1. Write the equation with y on the left and all x ’s on the right.
This is the end of the preview. Sign up to access the rest of the document.

{[ snackBarMessage ]}

### What students are saying

• As a current student on this bumpy collegiate pathway, I stumbled upon Course Hero, where I can find study resources for nearly all my courses, get online help from tutors 24/7, and even share my old projects, papers, and lecture notes with other students.

Kiran Temple University Fox School of Business ‘17, Course Hero Intern

• I cannot even describe how much Course Hero helped me this summer. It’s truly become something I can always rely on and help me. In the end, I was not only able to survive summer classes, but I was able to thrive thanks to Course Hero.

Dana University of Pennsylvania ‘17, Course Hero Intern

• The ability to access any university’s resources through Course Hero proved invaluable in my case. I was behind on Tulane coursework and actually used UCLA’s materials to help me move forward and get everything together on time.

Jill Tulane University ‘16, Course Hero Intern