document.write( "Question 843224: The 1st term of an arithmetic sequence is 6 times the 5th term. The sum of the 2nd and 8th terms is 8. Find the 20th term of this sequence? \n" ); document.write( "
Algebra.Com's Answer #516259 by richwmiller(17219)![]() ![]() You can put this solution on YOUR website! a =6(a + 4d) \n" ); document.write( "a =6a + 24d\r \n" ); document.write( "\n" ); document.write( "a2 = a + d \n" ); document.write( "a8 = a + 7d \n" ); document.write( "8=2a+8d \n" ); document.write( "4=a+4d \n" ); document.write( "24=6a+24d \n" ); document.write( "a =6a + 24d \n" ); document.write( "a=24 \n" ); document.write( "24=144+24d \n" ); document.write( "-120=24d \n" ); document.write( "-5=d \n" ); document.write( "an = a + (n - 1)d \n" ); document.write( "a20 = 24 -5(19) \n" ); document.write( "a20=-71 \n" ); document.write( " |