5. (20%) Find the volume of the solid generated by revolving the region bounded by and the lines y = 2 and x = 0 about(a) the line y = 2,(b) the line x = 4.
阿摩線上測驗
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and the lines y = 2 and x = 0 about(a) the line y = 2,(b) the line x = 4.