Results 1 to 2 of 2

Math Help - Logarithms and Exponents.

  1. #1
    Newbie
    Joined
    Dec 2011
    Posts
    3

    Logarithms and Exponents.

    Hi. This is sort of a mathematical emergency. My final exam is tomorrow and I can't do logarithms for my life. Below are problems in the text I really just can't do.

    1. log(base 3)100- log(base 3)18- log(base 3) 50
    2. ln(ln e^e^200)
    3. ln (3x^2/(x+1)^10) (it's the natural log of the entire thing so I put it in parentheses)

    There were easier ones that followed the law of logs but these don't seem to apply to them.

    Find the solutions of the exponential equation:
    1. 3^2x-1 = 5
    2. x^2e^x + xe^x - e^x = 0 (the first part is x raised to the 2nd power multiplied by e raised to the x power)
    3. log(base 2)(x^2 - x - 2) = 2

    Can't do these exponents either... I'm not even sure what I'm supposed to solve for.
    Follow Math Help Forum on Facebook and Google+

  2. #2
    MHF Contributor
    skeeter's Avatar
    Joined
    Jun 2008
    From
    North Texas
    Posts
    11,621
    Thanks
    426

    Re: Logarithms and Exponents.

    Quote Originally Posted by butlerw2 View Post
    Hi. This is sort of a mathematical emergency. My final exam is tomorrow and I can't do logarithms for my life. Below are problems in the text I really just can't do.

    1. log(base 3)100- log(base 3)18- log(base 3) 50
    2. ln(ln e^e^200)
    3. ln (3x^2/(x+1)^10) (it's the natural log of the entire thing so I put it in parentheses)

    There were easier ones that followed the law of logs but these don't seem to apply to them.

    Find the solutions of the exponential equation:
    1. 3^2x-1 = 5
    2. x^2e^x + xe^x - e^x = 0 (the first part is x raised to the 2nd power multiplied by e raised to the x power)
    3. log(base 2)(x^2 - x - 2) = 2

    Can't do these exponents either... I'm not even sure what I'm supposed to solve for.
    then you need to learn how ...

    Basic Log Rules / Expanding Log Expressions

    Solving Exponential Equations from the Definition

    Solving Logarithmic Equations from the Definition
    Follow Math Help Forum on Facebook and Google+

Similar Math Help Forum Discussions

  1. Exponents and Logarithms
    Posted in the Algebra Forum
    Replies: 8
    Last Post: October 30th 2010, 11:44 PM
  2. Exponents and logarithms
    Posted in the Algebra Forum
    Replies: 3
    Last Post: May 8th 2010, 01:25 PM
  3. exponents and logarithms
    Posted in the Algebra Forum
    Replies: 2
    Last Post: March 12th 2009, 03:07 PM
  4. Logarithms in Exponents
    Posted in the Pre-Calculus Forum
    Replies: 4
    Last Post: April 28th 2008, 02:18 PM
  5. application of exponents and logarithms
    Posted in the Calculus Forum
    Replies: 1
    Last Post: October 21st 2006, 03:03 PM

Search Tags


/mathhelpforum @mathhelpforum