Find the area of the surface generated by revolving the curve x = e^y + e^-y / 2 in the interval 0 ≤ y ≤ ln 7 about the y-axis. Set up the integral that gives the area of the given surface. The area is (Type an exact answer, using π as needed.)

Find the area of the surface generated by revolving the curve x = e^y + e^-y / 2 in the interval 0 ≤ y ≤ ln 7 about the y-axis. Set up the integral that gives the area of the given surface. The area is (Type an exact answer, using π as needed.)

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Find the area of the surface generated by revolving the curve x = e^y + e^-y / 2 in the interval 0 ≤ y ≤ ln 7 about the y-axis. Set up the integral that gives the area of the given surface. The area is (Type an exact answer, using π as needed.)

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