The n-th number in a given sequence of numbers might have more than one commonly‑encountered form. In the case of a sequence of equally‑spaced numbers, there are the following two forms that are commonly encountered: first form: a + (n – 1)d second form: (a – d) + nd They are algebraically equivalent, of course. … Continue reading forms of the n-th number in a sequence

# Day: November 14, 2020

# thematic summation

Sums are usually of arbitrary numbers, but sometimes a sum has a theme. A good example of this concerns the odd numbers, namely, the sum of the first n odd numbers. This thematic summation is of interest because of its gem of an answer: ‘n squared’. For example, the first 3 odd numbers are 1, … Continue reading thematic summation

# PDFfiller (‘short cut to the paperless office’)

Here’s the link to a review of this product. keywords: [workflow] [electronic signatures]

# summation exercises

Here’s the link to one such offering. keywords: [Mathematics] [adding]

# summation

Here’s the link to the Wikipedia article on this topic. keywords: [Mathematics] [adding]

# intangibles

gls-dependencies are called ‘intangibles’. keywords: [philosophy] [economics]

# wanted infrastructure upgrade

- removal of decorative items from corners of intersections, because they hinder line-of-sight of motorists crossing the intersection keywords: [traffic safety] [safety first[