document.write( "Question 998312: By using the formula for the sum of n terms of a Geometric Progression, find the sum of the first 10 terms of the series 62.5, -25, 10, -4......, correct to 3 decimal place. \n" ); document.write( "
Algebra.Com's Answer #616118 by fractalier(6550)![]() ![]() You can put this solution on YOUR website! By looking at this sequence, you can see that the ratio involved is (-2/5)...thus the remaining terms multiply by -0.4...and we get \n" ); document.write( "62.5, -25, 10, -4, 1.6, -.64, .256, -.1024, .04096, -.016384 \n" ); document.write( "Then round these to three decimal places. \n" ); document.write( " |