Set up, but do not evaluate, an integral for the area of the surface obtained by rotating the curve about the given axis.
$$y = e ^ { x } , 1 \leq y \leq 9 ; y \text {-axis }$$

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The Answer of Set up, but do not evaluate, an integral for the area of the surface obtained by rotating the curve about the given axis.
$$y = e ^ { x } , 1 \leq y \leq 9 ; y \text {-axis }$$

Set Up, but Do Not Evaluate, an Integral for the Area