Given an arithmetic progression of 14,9,4. Find what number is on the 81st place?
| September 14, 2021 | education
To determine the nth term of the arithmetic progression, we use the formula.
an = a1 + (n – 1) * d, where:
an – n – th member of the progression,
a1 – the first member of the progression,
n is the ordinal number of a member of the progression,
d – the difference of the arithmetic progression.
Then: a31 = a1 + (n – 1) * d = 14 + (31 – 1) * 5 = 14 – 150 = -136.
Answer: The 31st member of the progression is -136.
One of the components of a person's success in our time is receiving modern high-quality education, mastering the knowledge, skills and abilities necessary for life in society. A person today needs to study almost all his life, mastering everything new and new, acquiring the necessary professional qualities.
