What is the o'th term of -21, -137, -327, -585, -905, -1281, -1707?
-
What is the y'th term of -5, -5, -13, -35, -77, -145, -245?
-
What is the s'th term of 28, 29, 30, 31?
-
What is the o'th term of 71, -131, -331, -529, -725?
-
What is the j'th term of -90, -173, -256?
-
What is the t'th term of -97, -96, -117, -172, -273, -432, -661?
-
What is the x'th term of 79, 364, 833, 1480, 2299, 3284, 4429, 5728?
一个美术生