document.write( "Question 1115161: In a geometric sequence, the common ratio is -5. The sum of the first 3 terms is 147.What is the value of the first term in the sequence? \n" ); document.write( "
Algebra.Com's Answer #730051 by stanbon(75887)![]() ![]() ![]() You can put this solution on YOUR website! In a geometric sequence, the common ratio is -5. The sum of the first 3 terms is 147.What is the value of the first term in the sequence? \n" ); document.write( "-------- \n" ); document.write( "a + ar + ar^2 = 147 \n" ); document.write( "a(1+r+r^2) = 147 \n" ); document.write( "a(1-5+25) = 147 \n" ); document.write( "a = 147/21 \n" ); document.write( "a = 7 \n" ); document.write( "------------- \n" ); document.write( "Cheers, \n" ); document.write( "Stan H. \n" ); document.write( "--------- \n" ); document.write( " |