Let -2*r**3 + 18*r**2 + 20*r = 0. What is r?
-
What is the l'th term of -3, 7, 27, 63, 121, 207, 327?
-
What is the j'th term of -348, -346, -342, -336, -328, -318?
-
What is the v'th term of 8238, 16479, 24720, 32961, 41202, 49443?
-
What is the z'th term of 1280, 2580, 3882, 5186?
-
What is the j'th term of 190, 181, 168, 151, 130?
-
What is the u'th term of 2606, 5207, 7808, 10409?
一个美术生