document.write( "Question 1190304: Please help me solve this math problem:If the sum of 1+2x+4x²+8x³+... 1¼. Find x \n" ); document.write( "
Algebra.Com's Answer #821929 by greenestamps(13200)![]() ![]() You can put this solution on YOUR website! \n" ); document.write( "The expression is an infinite geometric series with first term a=1 and common ratio r=2x. The sum of an infinite geometric progression is given by the formula \n" ); document.write( " \n" ); document.write( "We are told the sum is 1 1/4 = 5/4: \n" ); document.write( " \n" ); document.write( "take reciprocals.... \n" ); document.write( " \n" ); document.write( " \n" ); document.write( " \n" ); document.write( "ANSWER: x=1/10 \n" ); document.write( " \n" ); document.write( " |