Answer:Step-by-step explanation:A harmonic sequence is a sequence of numbers whose reciprocals form an arithmetic sequence. Here are 10 examples of harmonic sequences: 1, 1/2, 1/3, 1/4, 1/5... (Reciprocals are 1, 2, 3, 4, 5...) 1/5, 1/10, 1/15, 1/20, 1/25... (Reciprocals are 5, 10, 15, 20, 25...) 1/2, 1/4, 1/6, 1/8, 1/10... (Reciprocals are 2, 4, 6, 8, 10...) 1/3, 1/6, 1/9, 1/12, 1/15... (Reciprocals are 3, 6, 9, 12, 15...) 1/10, 1/20, 1/30, 1/40, 1/50... (Reciprocals are 10, 20, 30, 40, 50...)1/7, 1/14, 1/21, 1/28, 1/35... (Reciprocals are 7, 14, 21, 28, 35...)1/15, 1/30, 1/45, 1/60, 1/75... (Reciprocals are 15, 30, 45, 60, 75...)1/2, 1/5, 1/8, 1/11, 1/14... (Reciprocals are 2, 5, 8, 11, 14...) 1/4, 1/7, 1/10, 1/13, 1/16... (Reciprocals are 4, 7, 10, 13, 16...)1/9, 1/18, 1/27, 1/36, 1/45... (Reciprocals are 9, 18, 27, 36, 45...)