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Question 0502c
Sigma Notation
Top Limit Handling
Question
Generate new
It is given that
∑
r
=
1
n
u
r
=
7
n
+
7.
\sum_{r=1}^n u_r = 7 n + 7.
r
=
1
∑
n
u
r
=
7
n
+
7.
Find an expression for
∑
r
=
1
n
−
3
u
r
.
{\displaystyle \sum_{r=1}^{n - 3} u_r.}
r
=
1
∑
n
−
3
u
r
.
Attempt
∑
r
=
1
n
−
3
u
r
=
{\displaystyle \sum_{r=1}^{n - 3} u_r =}
r
=
1
∑
n
−
3
u
r
=
Answer
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