Question: Please Help!!!! trouble plotting using shell, disk and washer method


Find the volume of the solid generated by revolving the region bounded by the x-axis, the curve y=3, and the lines x=1 and x=-1 about (a) the x-axis; (b) the y-axis; (c) the line x=1; (d) the line y=3.


(a) 2π (b)π (c)12π/5 (d)26π/5




(a) Disc Method







(b) Shell Method





(c) Shell Method





(d) Washer method

outer radius x=3 inner radius x=3-3x^4


Have a clue how to do part d as horizontal disks I assume using the plots above?





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