Product Rule. If the two functions f(x) and g(x) are differentiable (i.e. the derivative exist) then the product is differentiable and, The proof of the Product Rule is shown in the Proof of Various Derivative Formulas section of the Extras chapter.
Inflammation is the most common reason for muscle pain and aches. Any time that major inflammation exists (strep throat, hepatitis, cancer, lupus, acute heart attack, etc.), signs and symptoms often include fevers, sweats, chills, fatigue, weight loss, and various muscle aches, pains and weakness.
Living well with lupus. Photosensitivity is the term used to describe sensitivity to the ultraviolet (UV) rays from sunlight and other light sources, such as indoor fluorescent light.Photosensitivity can cause rashes, fever, fatigue, joint pain, and other symptoms in people with both cutaneous (skin) and systemic lupus.UV rays are especially intense between the hours of 10 a.m. and 4 p.m., at higher altitudes, and in or around the snow and the water.Excess exposure to UV rays is a common trigger for increased disease activity (flare) of both cutaneous lupus and systemic lupus.V rays are especially intense between the hours of 10 a.m. and 4 p.m., at higher altitudes, and in or around the snow and the water. Excess exposure to UV rays is a common trigger for increased disease activity (flare) of both cutaneous lupus and systemic lupus.