Question

Here’s the problem (sorry I just thought it would be easier if I send the picture instead):

Answer 1

Question 9

Given

n=100

The triangular numbers are given by the following explicit formulas:

n=100

`\begin{gathered} T_n=(n(n+1))/(2) \\ \\ T_(100)=(100(100+1))/(2) \\ \\ T_(100)=(100(101))/(2) \\ \\ T_(100)=(100(101))/(2) \\ \\ T_(100)=(10100)/(2) \\ \\ T_(100)=5050 \end{gathered}`