Answer:
a_n = 50 - 5n, for n = 1,2, 3, ...
Step-by-step explanation:
a_1 = 50
a_2 = 50 - 5 = 45
a_3 = 50 - 2 * 5 = 40
a_n = 50 - (n - 1) * 5
a_n = 50 - 5n + 5
a_n = 50 - 5n
Answer:
an = -5n + 55.
Step-by-step explanation:
This is arithmetic with common difference -5.
an = a1 + d(n-1)
an = 50 - 5(n - 1)
an = 50 - 5n + 5
an = -5n + 55.
