Typically, the accessory renal artery courses into the renal hilum to perfuse the upper or lower renal poles. They may also enter the renal parenchyma directly from the renal cortex (called a polar artery). Rarely, they may arise from the lower thoracic aorta, as well as from the lumbar and mesenteric arteries.
The chain rule can be used to find whether they are getting closer or further apart. For example, one can consider the kinematics problem where one vehicle is heading west toward an intersection at 80 miles per hour while another is heading north away from the intersection at 60 miles per hour.
Definition of Quotient Rule. The quotient rule is one of several rules used to find the derivative of a function. Specifically, the quotient rule finds the derivative of the quotient of two functions, provided that the derivatives of both those functions exist. If a function f (x) can be written as, and, then v. The quotient rule can be extended to find the second derivative as well, by replacing the original functions g (x) and h (x) with the numerator and denominator of the first derivative, respectively. The quotient rule is derived from the application of the product rule and chain rule.