Размер видео: 1280 X 720853 X 480640 X 360
Показать панель управления
Автовоспроизведение
Автоповтор
You can also take u^2 = x^2 + 1, then udu = xdx, so you get 3udu/sqrt(u^2) and if you change boundaries appropriately 0 -> 1, 2 -> sqrt 5, the integrand simplifies to 3du, so the solution is 3(sqrt 5 - 1).
You can also take u^2 = x^2 + 1, then udu = xdx, so you get 3udu/sqrt(u^2) and if you change boundaries appropriately 0 -> 1, 2 -> sqrt 5, the integrand simplifies to 3du, so the solution is 3(sqrt 5 - 1).