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.
About 50% of people with lupus have a butterfly rash (Source: PubMed Health). Lupus is a chronic autoimmune disease that can have a serious and widespread effect on the body, including the skin, joints, muscles, and other organs.Butterfly rash and other symptoms of lupus are the result of tissue inflammation throughout various parts of the body.bout 50% of people with lupus have a butterfly rash (Source: PubMed Health). Lupus is a chronic autoimmune disease that can have a serious and widespread effect on the body, including the skin, joints, muscles, and other organs.