In pituitary apoplexy, the main initial problem is a lack of secretion of adrenocorticotropic hormone (ACTH, corticotropin), which stimulates the secretion of cortisol by the adrenal gland. This occurs in 70% of those with pituitary apoplexy.
DEFINITION of 'Net Present Value Rule'. A rule stating that an investment should be accepted if its net present value is greater than zero and rejected otherwise.According to the theory of net present value (NPV), participating in a positive NPV project will increase firm or shareholder wealth. rule stating that an investment should be accepted if its net present value is greater than zero and rejected otherwise.
Figure 5.1.1. Some local maximum points ($A$) and minimum points ($B$). If $(x,f(x))$ is a point where $f(x)$ reaches a local maximum or minimum, and if the derivative of $f$ exists at $x$, then the graph has a tangent line and the tangent line must be horizontal. This is important enough to state as a theorem, though we will not prove it.