document.write( "Question 634229: What is the formula for the following arithmetic sequence? -2, 3, 8, 13, .. \n" ); document.write( "
Algebra.Com's Answer #399436 by jim_thompson5910(35256)![]() ![]() ![]() You can put this solution on YOUR website! You're adding 5 each time. So d = 5\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "You're starting at -2, so a1 = -2\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "The formula is then\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "an = a1 + (n-1)*d\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "an = -2 + (n-1)*5\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "an = -2 + 5n-5\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "an = 5n - 7\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "So the formula is \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "-------------------------------------------------------------------------------------------------------------- \n" ); document.write( "If you need more help, email me at jim_thompson5910@hotmail.com\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "Also, please consider visiting my website: http://www.freewebs.com/jimthompson5910/home.html and making a donation. Thank you\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "Jim \n" ); document.write( "-------------------------------------------------------------------------------------------------------------- \n" ); document.write( " |