document.write( "Question 858064: 4th and 7th term of an AP are 9 and 21 respectively. Find the 1st eight terms of the sequence \n" ); document.write( "
Algebra.Com's Answer #517035 by richwmiller(17219)![]() ![]() You can put this solution on YOUR website! an = a + (n - 1)d \n" ); document.write( "21= a + 6d \n" ); document.write( "9 = a + 12 \n" ); document.write( "12=3d \n" ); document.write( "d=4 \n" ); document.write( "a=-3 \n" ); document.write( "-3+4=1 etc\r \n" ); document.write( "\n" ); document.write( "-3,1,5,9,13,17,21,25 \n" ); document.write( " \n" ); document.write( " |