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Page 133 - The derivative of the quotient of two functions is equal to the denominator times the derivative of the numerator minus the numerator times the derivative of the denominator, all divided by the square of the denominator.
Page 305 - The bisector of an exterior angle of a triangle divides the opposite side externally into segments which are proportional to the other two sides.
Page 126 - The transform of the sum of two functions is equal to the sum of the transforms.
Page 382 - In a horizontal plane the distance d between two points A and B is known. Given, that the intensity of light varies directly as the sine of the angle of incidence ; and, inversely, as the square of the distance, to find at what height h, perpendicularly above A, an incandescent point must be situated in order that the intensity of light from it at the point B may be at a maximum. , , dV'2 Ans. h = — • 23. An open bin, with square base and vertical sides, is to hold a given volume of wheat. What...
Page 383 - A perpendicular lamp post is to be erected at a given horizontal distance d from a statue. What must be the height of the lamp above the head of the statue in order that the top of the head may be most strongly illuminated? HINT. According to physics, the intensity of the illumination is inversely proportional to the square of the distance of the light from the illuminated point, and directly proportional to the sine of the angle at which the rays of light (; siu LSP strike the object.
Page 94 - III. The limit of a fraction is the limit of the numerator divided by the limit of the denominator. Let x and y approach simultaneously the limits I and m x I respectively.
Page 411 - This volume by Dr. Brown is one of the best books on the subject. It should be studied by all, in order that any discussion of it, whether in the pulpit or in private conversation, should be intelligent.