Try another version of this question Get help: Box 1: Enter your answer as a number (like 5, -3, 2.2172) or as a calculation (like 5/3, 2^3, 5+4) Box 2: Enter your answer as an expression. Example: 3x^2+1, x/5, (a+b)/c
Write the sum using sigma notation:
` 1+2+3+4+\cdots+140 =\sum_(n=1)^(A) B `, where
`A=`
`B=`
Enter DNE for Does Not Exist, oo for Infinity 140
Be sure your variables match those in the question `n`