Triangular numbers (T n ) are defined by the number of dots that occur when arranged in

Question:

Triangular numbers (Tn) are defined by the number of dots that occur when arranged in equilateral triangles, as shown in Figure 7.5. Show that Tn = 1/2n(n + 1) for every positive integer n.

Figure 7.5 Triangular numbers.

Fantastic news! We've Found the answer you've been seeking!

Step by Step Answer:

Related Book For  book-img-for-question
Question Posted: