👉 Integrand is a mathematical function that represents the derivative of an integral. It is often used in calculus and physics to analyze and manipulate functions, as it allows for the calculation of areas under curves or volumes enclosed by surfaces. The integral of a function f(x) over a closed interval [a, b] is defined as: ∫ab f(x) dx = F(b) - F(a) where F(b) is the antiderivative of f(x), and F(a) is the