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Mathematics
Problem
Let
T
n
T_n
T
n
denote the sum of the first
n
n
n
natural numbers. What is the value of
T
n
+
1
−
T
n
T_{n+1}-T_n
T
n
+
1
−
T
n
? a)
n
n
n
b)
n
+
2
n+2
n
+
2
c)
n
+
1
n+1
n
+
1
d)
2
n
2n
2
n
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