Summation Rules

  • #1
n
∑ 3
k=0

How does this make sense when k=0?
 

Answers and Replies

  • #2
319
64
The sum is ##3+3+...=3(n+1)##
 
  • #3
The sum is ##3+3+...=3(n+1)##
Oh okay. The lower bound is the index origin and doesn't matter if it is negative?
n
∑ 3
k=-1
3+3+...=3(n+2)
 
  • #5
DrClaude
Mentor
7,568
3,906
To summarise,
$$
\sum_{k=a}^{b} c = c (b-a+1)
$$
for constant ##c##.
 
  • #6
jbriggs444
Science Advisor
Homework Helper
9,650
4,301
To summarise,
$$
\sum_{k=a}^{b} c = c (b-a+1)
$$
for constant ##c##.
i.e. one is counting fence posts, not sections of wire.
 

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