Appendix I Using Summation Notation with GAMS Form

Instructions and help about Appendix I Using Summation Notation With GAMS

in this video we're gonna go over the summation formulas that you need to know in calculus particularly if you want to find the area of a region so let's say if we wish to evaluate this sum so it's given to us using Sigma notation so what is this equal to now there is a formula for this type of problem if you have a constant C and if I is equal to 1 and it goes up to n then it's going to equal the constant times n in this case we're adding eight four times so the constant is eight so therefore I had an eight four times is the same as multiplying it by four and this will give you 32 now let's work on some other examples try these two problems let's say I is one the constant is 7 and this is 8 and also let's say this is 9 and this is 5 so the first one is simply gonna be C times n 7 times 8 so that's 56 for this second example it's gonna be C times n or 9 times 5 which is 45 so that's how you can evaluate as sum if you have a constant in Sigma notation now the next formula that you need