The Sum is not what I want

Question:The Sum is not what I want

Posted: lcz 994 Product: Maple 2020

December 30 2020

The code

S:=sum(1/x__i,i=1..5)

will give us the following ouput

Why not

S:=add(1/x__i,i=1..5)

also give same result. why?How to do?

I also note that:

S:=add(1/x||i,i=1..5)

S:=sum(1/x||i,i=1..5)

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