What is ln(5p+9)= -2
Favorites|Homepage
Subscriptions | sitemap
HOME > Mathematics > What is ln(5p+9)= -2

What is ln(5p+9)= -2

[From: ] [author: ] [Date: 11-09-06] [Hit: ]
So this problem is undefined.-ln(5p+9)= -2 ----->5p+9 = e^(-2) ---> p = .........
i know the answer is -9e^2+1/ 5e^2
my teacher didn't teach me about negative logs so i'm trying to figure it out

-
OK. You've been given a bunch of answers...but let's work the process.

You know the e^ln(x) = x right. and e^-2 = 1/e^2 right.

So, 5p+9 = 1/e^2 and this leads to 5p = (1/e^2)-9 or (1-9e^2)/e^2 and if you divide both sides by 5 you get the answer you provided
p = (1-9e^2)/(5e^2)

-
5p + 9 = e^-2 This happens when you take the antilog of a number.

5p = - 9 + e^-2 Now divide by 5

p = -9/5 + 1/5e^2 This should be your answer.

or

(-45 * e^2 + 1) / 5 e^2

JC

-
I think you have a typo and the negative sign is a mistake.

thus e^2=5p+9

p=(e^2-9)/5=e^2(1-9/e^2)/5 or "-9e^2+1/ 5e^2"

-
You can't take the log of a negative number. Ever. So this problem is undefined.

-
ln(5p+9)= -2 ----->5p+9 = e^(-2) ---> p = ...
1
keywords: ln,What,is,What is ln(5p+9)= -2
New
Hot
© 2008-2010 http://www.science-mathematics.com . Program by zplan cms. Theme by wukong .