document.write( "Question 590236: 1. Show that log8x=1/3 log2x hence solve the equation for x>0
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document.write( " Log2(3x+1) +log8(x-1)3=0
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Algebra.Com's Answer #375083 by lwsshak3(11628)![]() ![]() ![]() You can put this solution on YOUR website! 1. Show that log8x=1/3 log2x hence solve the equation for x>0 \n" ); document.write( "Log2(3x+1) +log8(x-1)3=0 \n" ); document.write( "** \n" ); document.write( "log8x=1/3 log2x \n" ); document.write( "change to base2 \n" ); document.write( "log8x=log2x/log2(8)=log2x/3 \n" ); document.write( ".. \n" ); document.write( "log2(3x+1) +log8(x-1)*3=0 \n" ); document.write( "change to base 2 \n" ); document.write( "log2(3x+1) +log2(x-1)*3/log2(8)=0 \n" ); document.write( "log2(3x+1) +log2(x-1)*3/3=0 \n" ); document.write( "log2(3x+1) +log2(x-1)=0 \n" ); document.write( "place under single log \n" ); document.write( "log2[(3x+1)(x-1)]=0 \n" ); document.write( "convert to exponential form: \n" ); document.write( "2^0=(3x+1)(x-1)=1 \n" ); document.write( "3x^2-2x-2=0 \n" ); document.write( "solve by quadratic formula: \n" ); document.write( "x≈-.549 (reject,x>0) \n" ); document.write( "or \n" ); document.write( "x=1.215\r \n" ); document.write( "\n" ); document.write( " \n" ); document.write( " |