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baherus [9]
3 years ago
12

What is the 100th triangular number?

Mathematics
1 answer:
krek1111 [17]3 years ago
5 0

Answer:

T_1_0_0=5050

Step-by-step explanation:

A triangular number is number that can be recomposed in the form of an equilateral triangle. Each triangular number is defined by:

T_n=\frac{n^2+n}{2} \hspace{5} n\in N

Hence, evaluating n=100

T_1_0_0=\frac{(100)^{2}+100 }{2} =5050

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Hello! 

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The answer is D.
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