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Question: sum() ind subs()

Question:sum() ind subs()

Dirk 242 Maple
student
January 20 2008
0
Why does Maple not substitute the value for y[1] in the result? subs(m=3,y[1]=2,sum(r[i]*y[i],i=1..m));%; I assume that the values were substituted in sum() but subs() does not execute sum(). Accordingly there is at the timepoint of substitution no y[1] in sum()? Thanks Dirk
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