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Chisinau City MO
1949-56 Chisinau City MO
37
Chisinau MO p37 1949-56 VIII-IX sum nx+(n-1)x^2+...+2x^{n-1}+x^n
Chisinau MO p37 1949-56 VIII-IX sum nx+(n-1)x^2+...+2x^{n-1}+x^n
Source:
March 15, 2021
algebra
Sum
Problem Statement
Calculate the sum:
n
x
+
(
n
−
1
)
x
2
+
.
.
.
+
2
x
n
−
1
+
x
n
nx+(n-1)x^2+...+2x^{n-1}+x^n
n
x
+
(
n
−
1
)
x
2
+
...
+
2
x
n
−
1
+
x
n
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