document.write( "Question 619384: Trying to find the sum 41+42+43+44+.....+118 \n" ); document.write( "
Algebra.Com's Answer #389606 by ewatrrr(24785)\"\" \"About 
You can put this solution on YOUR website!
 
\n" );
document.write( "Hi,
\n" );
document.write( "finding the sum  of sequence: 41+42+43+44+.....+118
\n" );
document.write( "Arithmetic Sequence with \"a%5B1%5D+=+41\" and d = 1
\n" );
document.write( "\"a%5Bn%5D=a%5B1%5D%2B%28n-1%29%2Ad\"
\n" );
document.write( "\"a%5Bn%5D=+41%2B%28n-1%29%2A1+=+118\"
\n" );
document.write( "     n = 118-41 + 1
\n" );
document.write( "     n = 78
\n" );
document.write( "\"S%5Bn%5D=%28n%2F2%29%282%2Aa%5B1%5D%2B+%28n-1%29d%29\"
\n" );
document.write( "\"S%5B78%5D=%2878%2F2%29%282%2A41%2B+%2877%291%29\"
\n" );
document.write( "\"S%5B78%5D=%2839%29%28159%29\"
\n" );
document.write( "\"S%5B78%5D=+6201\" \n" );
document.write( "
\n" );