SOLUTION: I have a triangle of dots progressing in size. The first triangle has one dot, the second triangle has three dots, the third triangle has nine dots, ect. I need help with the for

Question 335383: I have a triangle of dots progressing in size. The first triangle has one dot, the second triangle has three dots, the third triangle has nine dots, ect. I need help with the formula when it asks how many dots the "nth" triangle has.
Answer by Edwin McCravy(20056) (Show Source): You can put this solution on YOUR website!


Triangle 1, the first triangle, has 1 =  dots
Triangle 2, the second triangle, has 3 =  dots
Triangle 3, the third triangle, has 9 =  dots

So it looks like the exponent of 3 in the number of dots
is 1 less than the triangle number, so

Triangle n, the nth triangle, has  dots.

Edwin

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