Write a program that lets you know if you can have a key or not, based on your role at the school.
First ask for the user’s role at the school. They can be a student, administrator, or a teacher. (And remember that capitalization is important! ‘Student’ is not the same as ‘student’.)
Example 1: Administrator or Teacher
For example, if this was the input:
Are you an administrator, teacher, or student?: teacher
This should be the output:
Administrators and teachers get keys!
Example 2: Student
And if this was the input:
Are you an administrator, teacher, or student?: student
This should be the output:
Students do not get keys!
(Note: You should also be able to handle a situation where the user enters a value other than administrator, teacher or student and tell them they must be one of the three choices!)
Example 3: Other
If they input anything else:
Are you an administrator, teacher, or student?: secretary
This should be the output:
You can only be an administrator, teacher, or student!
Ответ:
U ≈ 1432.678
V ≈ 180.876
Решение:
При a=b=0, данные соотношения будут иметь следующий вид:
Un+1 = 1.06*Un , U0 = 800Vn+1 = 0.99*Vn , V0 = 200То есть каждый новый член последовательности U будет в 1.06 раз больше предыдущего, а каждый новый член V — в 0.99 раз.
Итак, первый член последовательности (геом. прогрессии) U0 равен 800, а V0 — 200. Получаем, что:
U = * V = * По условию N = 10, подставляем и смотрим:
U₁₀ = * ≈ 1432.678V₁₀ = * ≈ 180.876