As before, we can ask ourselves: What happens as {{MATH_93}} gets closer and closer to {{MATH_94}}? In other words, what is the meaning of the limit of slopes of secant lines through the points {{MATH_95}} and {{MATH_96}} as {{MATH_97}} gets closer and closer to {{MATH_98}}? How can we interpret the limit {{MATH_99}} provided that the limit exists? This scenario is illustrated in the figure below. What happens as {{MATH_100}}? {{CMD_101}}{{ENV_102}}{{CMD_103}}