After harmony was introduced into music during the late Middle Ages, major and minor triads emerged as the principal chords. The major triad, as C E G, was regarded with especial favor, because it occurs naturally in the harmonic series, as on bugles, and can be expressed by the simple ratios, 4:5:6. A system of tuning for the diatonic scale known today as just intonation gained support in the 16th century, because its principal triads, C E G, F A C, and G B D, had these just ratios. But an important minor triad, D F A, is harsh in just intonation, and other unsatisfactory triads result when this tuning is extended to the complete chromatic scale.

While reviewers were lukecool (38% on Rotten Tomatoes), Cirque du Freak did make money for Universal Pictures. The film, based on graphic novels by Darren Shan, yielded $14 million domestically and nearly $40 million worldwide.

For $600, they dropped an obese white oak that was lurching after my roof deck, two poplars and a diseased maple, plus three more loblolly pines.

The additive inverse of x is -x, as x-x=0, as 0 is the additive identity element.