In an arithmetic sequence, the 7th term is 30, and the 11th term is 60. What is the 21st term of this sequence?
Question:
In an arithmetic sequence, the 7th term is 30, and the 11th term is 60. What is the 21st term of this sequence?
Answer:
Let's think step by step.

user
135
In an arithmetic sequence, the 7th term is 30, and the 11th term is 60. What is the 21st term of this sequence?
train