Question
In an Apartment the 8th term is twice the 4th term and 20th term is 20. Find the first term, the common difference
Answers
oobleck
apartment? do you ever read what you post?
a+7d = 2(a+3d)
a+19d = 20
now just solve as usual for a and d
a+7d = 2(a+3d)
a+19d = 20
now just solve as usual for a and d