document.write( "Question 340247: I am asked to express in terms of log m and log n\r
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Algebra.Com's Answer #243822 by Theo(13342)![]() ![]() You can put this solution on YOUR website! I could interpret this in 2 ways.\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "The first way would be:\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( " \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "Under that assumption, your answer would be:\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( " \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "The second way would be:\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( " \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "Under that assumption, your answer would be:\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( " \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "The difference is in whether you are taking 10 * m and then raising the result to the 3d power, or you are taking m to the third power and then multiplying the result by 10.\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "There are two main concepts at work.\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "The first concept is that \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "The second concept is that \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "If you are solving for \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "If you are solving for \n" ); document.write( "the letter a represents (10*m) and the letter b represents 3.\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "Note that the concept used for each piece of the puzzle changes as you progress through the steps of the problem.\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "log(10*m^3) becomes log(10) + log(m^3) because a represents 10 and b represents m^3. The first concept was used.\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "now that you have log(10) + log(m^3), then the second part of log(m^3) becomes 3*log(m) because a represents m and b represents 3). The second concept was used on the second part.\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "The first concept was used to break it up into 2 pieces.\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "The second concept was used to break the second piece down further.\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "The log of (10 * m^3) is not the same as the log of ((10*m)^3).\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "The base used was not important to the solution because the same concepts apply regardless of the base.\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "If you assume n is 10, then you can solve for any m using the calculator.\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "If you assume n is the natural log to the base e, then you can solve for any m using the calculator.\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "If n is any number other than 10 or e, then you would need to use the conversion formula to solve using your calculator.\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "To do that, you would do the following:\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "Assume log of m to the base n.\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "Take the log of m to the base 10 and divide it by the log of n to the base 10.\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "You will get the same answer.\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "An easy example:\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "Log of 8 to the base 2 = 3 because 2^3 = 8.\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "To solve this using your calculator, you would take the log of 8 to the base 10 and divide that by the log of 2 to the base 10.\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "Using your calculator, you would get LOG(8) / LOG(2) = 3.\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "When you use your calculator, the LOG function implies the base of 10.\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "Similarly, when you use your calculator, the LN function implies the base of e.\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "You could also have done LN(8) / LN(2) and gotten the same answer of 3.\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "You can convert the log of any base to the log of any other base by using the conversion formula of:\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( " \n" ); document.write( " \n" ); document.write( " \n" ); document.write( " \n" ); document.write( " \n" ); document.write( " \n" ); document.write( " \n" ); document.write( " \n" ); document.write( "\n" ); document.write( " \n" ); document.write( " |