Thread: Create sum expression from algebraic expression

Oh ok I see my mistake now, I was confused on the use of the subscripts. Now I understand how to write them correctly. Thank you very much, I really appreciate it.

how come I cannot set the upper script 12?

You need to wrap the upper limit {12} in curly braces in LaTeX.

Again, this is not an equation, so I can't say if it true or false. This thread is becoming big, and I am having trouble getting your implied references to earlier posts.

= 780000
= 680000
= 570000

Are any of those statements true?

The first two are true for x = 10000. The third becomes true if you replace 8x by 6x, as in post #8.

thanks i appreciate it.