Calculus, Artificial Intelligence, Blogging.
Rectangle Area of rectangle = l x b = (8-x)*x f(x) = 8x-x² f`(x) = 8–2x f``(x) = -2 Here f``(x) is negative, so the function f(x) is concave down. Then the stationary point is the maximum point. To find stationary point, f`(x) = 0 8–2x = 0 2x = 8 x = 4 When x = 4, 8-x = 4, we obtain the maximum