Original
This is how we define a new function, {{MATH_50}}, the derivative of {{MATH_51}}. The domain of {{MATH_52}} consists of all points in the domain of
{{MATH_53}} where the function {{MATH_54}} is differentiable. The value {{MATH_55}} gives us the instantaneous rate of change of {{MATH_56}} at any point {{MATH_57}} in the domain of {{MATH_58}}.{{CMD_59}}