Amount and Quality of Light. The lighting in classrooms is extremely important to learning. One of the major causes of stress in schools is over-lighting. Fluorescent lights are the worst and their constant flickering is distracting and can cause headaches as well as reduce the amount of serotonin in the brain.
The sum of the terms of the geometric sequence is known as a geometric series; Sn = ar+ ar2 + ar3 + â¯ + arn = âi=1ân ari. The sum of the geometric series can be calculated using the following formula. Sn = a(1-rn)/(1-r); where a is the initial term and r is the ratio. If the ratio, r â¤ 1, the series converges.
Wiktionary (0.00 / 0 votes) Rate this definition: geometric progression (Noun). A sequence in which each term except the first is obtained from the previous by multiplying it by a constant value, known as the common ratio of the geometric progression.he sum of the terms of a geometric progression, or of an initial segment of a geometric progression, is known as a geometric series. Thus, the general form of a geometric sequence is and that of a geometric series is where r â  0 is the common ratio and a is a scale factor, equal to the sequence's start value.