The graph shows the function f(x). Which equation represents f(x)? 0 f(x) = -Ix f(x) = -1 -1 3 2 f(x) = I - x 1 2 1 O 2 (x) = 3 - x -10.-8.-5.-A.-24 2 4 6 8 10 X 이후​

Use the method of cylindrical shells to find the volume v generated by rotating the region bounded by the curves about the given axis. y = 7ex, y = 7e^-x, x = 1; about the y-axis