I would think that Un + m would equal 2m since Un = m. Could you explain why that is not the case?
Hello, shawli!
You typed part (b) incorrectly . . .
The term is given by: . . where: .For a given arithmetic sequence: .
Find: .
. . . . .
Answers: .
We have: .
Equate [1] and [2]: .
. . . . . .
If , we have: .
. . and the arithmetic sequence cannot be determined.
If , then: .
. . . .
Since , we have: .