In Exercises 6570, let {an} = -5, 10, -20, 40,c, {bn} = 10, -5, -20, -35, c, and {cn} = -2, 1, -1 2, 1 4 , .cFind the product of the sum of the first 6 terms of {an} andthe sum of the infinite series containing all the terms of{cn}.

Lecture 9: Continuity (Sections 2.4 and 2.8) Def. Aunin f is continuous at a number c if x→c f(x)= If f is deﬁned on an open interval including x = c but is not continuous there, then f is discontinuous...