document.write( "Question 988307: Geometric Progression.1. Consider the sequence 81,27,9,3.
\n" ); document.write( " i. Find the 10th term of this sequence.
\n" ); document.write( "ii. Find the sum of the first 10 terms of this sequence.
\n" ); document.write( "iii. Consider the first 20 terms of this sequence and find the sum of even number of terms. \n" ); document.write( "

Algebra.Com's Answer #608893 by Fombitz(32388) $\"\"$ $\"About$

You can put this solution on YOUR website!
These are decreasing powers of 3 starting with $\"3%5E4\"$
\n" ); document.write( " $\"a%5Bn%5D=3%5E%285-n%29\"$
\n" ); document.write( " $\"a%5B1%5D=3%5E4=81\"$
\n" ); document.write( " $\"a%5B2%5D=3%5E3=27\"$
\n" ); document.write( " $\"a%5B3%5D=3%5E2=9\"$
\n" ); document.write( " $\"a%5B4%5D=3%5E1=3\"$
\n" ); document.write( "I) $\"a%5B10%5D=3%5E%285-10%29=3%5E%28-5%29=1%2F243\"$
\n" ); document.write( "II)

\n" ); document.write( "III)

\n" ); document.write( " \n" ); document.write( "

\n" );