document.write( "Question 27407: I was wondering if you could perhapse teach me how to solve this question step by step. thank you.\r
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document.write( "10^(x-3)=e^(2x+5) \n" );
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Algebra.Com's Answer #14891 by sdmmadam@yahoo.com(530)![]() ![]() ![]() You can put this solution on YOUR website! Show for x. \n" ); document.write( "10^(x-3)=e^(2x+5)\r \n" ); document.write( "\n" ); document.write( "Given 10^(x-3)=e^(2x+5) \n" ); document.write( "Taking logarithm on both the sides to the base e (the Naperian base) \n" ); document.write( "loge[10^(x-3)] = loge[e^(2x+5)] \n" ); document.write( "which implies (x-3)log10 = (2x+5)loge (the base being e on both the sides) \n" ); document.write( "Here we have taken logarithm on both the sides with an idea to bring the power down using the formula loge(m^n) = n X loge(m) \n" ); document.write( "Therefore (x-3)X loge(10) = (2x+5)X loge(e) \n" ); document.write( " (x-3)y = (2x+5)X 1 (log e to the same base e is 1) \n" ); document.write( "We have put loge(10) = y for convenience. \n" ); document.write( "So, we have (x-3)y = (2x+5) \n" ); document.write( " which is xy -3y = 2x +5 \n" ); document.write( " xy - 2x = 5 + 3y (transposing, change side then change sign) \n" ); document.write( " x(y-2) = 5 + 3y \n" ); document.write( "Dividing by (y-2)(which is not zero) \n" ); document.write( " x = (5+3y)/(y-2) where y = loge(10) \n" ); document.write( "Note: (y-2) is not zero because y = loge(10) is not equal to 2 \n" ); document.write( " \n" ); document.write( " |