Try another version of this question

Is the sequence `a_n=9+2 n` arithmetic?

Your answer is (input yes or no):

If your answer is yes,

its first term is

and its common difference is .

Your answer is (input yes or no):

If your answer is yes,

its first term is

and its common difference is .

Get help:

Box 1: Enter your answer as letters. Examples: A B C, linear, a cat

yes

Box 2: Enter your answer as a number (like 5, -3, 2.2172) or as a calculation (like 5/3, 2^3, 5+4)

Enter DNE for Does Not Exist, oo for Infinity

11

Box 3: Enter your answer as a number (like 5, -3, 2.2172) or as a calculation (like 5/3, 2^3, 5+4)

Enter DNE for Does Not Exist, oo for Infinity

2