document.write( "Question 199719: what is the answer of 2+4+6....+56+58+60 \n" ); document.write( "
Algebra.Com's Answer #150091 by stanbon(75887)![]() ![]() ![]() You can put this solution on YOUR website! what is the answer of 2+4+6....+56+58+60 \n" ); document.write( "---------- \n" ); document.write( "Find the number of terms using a(n) = a(1) + (n-1)d: \n" ); document.write( "60 = 2 + (n-1)2 \n" ); document.write( "58 = (n-1)2 \n" ); document.write( "n-1 = 29 \n" ); document.write( "n = 30 \n" ); document.write( "--------------- \n" ); document.write( "Find the sum of the 30 terms using S(n) = (n/2)(1st + last) \n" ); document.write( "S(30) = (30/2)(2+60) \n" ); document.write( "S(30) = 15*62 \n" ); document.write( "S(30) = 930 \n" ); document.write( "================= \n" ); document.write( "Cheers, \n" ); document.write( "Stan H. \n" ); document.write( " |