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    sim0nz12345's Avatar
    sim0nz12345 Posts: 77, Reputation: 2
    Junior Member
     
    #1

    Aug 3, 2007, 06:56 AM
    Finding solutions
    Hi there, could you please tell me how to find these x values

    Below is an enclosed attachment

    Thanks
    Attached Files
  1. File Type: doc Equations.doc (15.5 KB, 195 views)
  2. galactus's Avatar
    galactus Posts: 2,271, Reputation: 282
    Ultra Member
     
    #2

    Aug 3, 2007, 10:41 AM
    I will show you how to do the first one, then you do the second and post your attempt. I, or someone, will critique.



    When you multiply exponents, you add them.

    x+x+1=2x+1, therefore,

    and since



    Divide by 2 and then ln of both sides:



    law of exponents:





    I was just trying to show you the exponent laws. Learn them. They're easy once you practice a little. Very mechanical.
    sim0nz12345's Avatar
    sim0nz12345 Posts: 77, Reputation: 2
    Junior Member
     
    #3

    Aug 3, 2007, 05:28 PM
    Well for b), I guess I would bring the 5 over to the other side with the 5^x
    But from there I don't know
    Thanks for all the help so far

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