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

Guest Feb 17, 2020

#1**+1 **

This question was asked here too: https://web2.0calc.com/questions/in-an-arithmetic-sequence-the-7th-term-is-30-and

milkcloud Feb 17, 2020