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 Apr 28 awarded Nice Question Apr 27 asked Singularity of $f(z)=\frac{\sin z}{z}$ at $z=0$ Apr 26 asked Help in the demonstration of the theorem 1.2 chapter V from Conway's complex analysis book Apr 25 accepted Help in a demonstration of a theorem in Hoffman and Kunze's linear algebra book (theorem 13 section 1.6) Apr 25 comment Help in a demonstration of a theorem in Hoffman and Kunze's linear algebra book (theorem 13 section 1.6) Thank you for your answer! Apr 25 asked Help in a demonstration of a theorem in Hoffman and Kunze's linear algebra book (theorem 13 section 1.6) Apr 24 asked Question about row-reduced matrices Apr 9 awarded Popular Question Apr 4 awarded Notable Question Apr 3 awarded Notable Question Mar 28 accepted How to find this volume using cyllindrical shells (vertical rectangles) Mar 28 comment How to find this volume using cyllindrical shells (vertical rectangles) Thank you for your answer. I have a question, the difference of shells and washers is because one is parallel to the axis of rotation and another is perpendicular to the axis of rotation? Mar 28 asked How to find this volume using cyllindrical shells (vertical rectangles) Mar 10 asked How to plot $f(x)=x^{2/3}$ Feb 18 comment Is this example in the Leithold's calculus book wrong? Thank you very much!!! Feb 18 accepted Is this example in the Leithold's calculus book wrong? Feb 18 comment Is this example in the Leithold's calculus book wrong? Could you please add the solution of the volume of the cylinder I draw using the circular disk method? Feb 18 revised Is this example in the Leithold's calculus book wrong? added 141 characters in body Feb 18 comment Is this example in the Leithold's calculus book wrong? @Galc127 I agree, but following your argument, the example should be $\int ((\sqrt{20-4y}+1)^2-1^2)dy$, instead of $\int (20-4y)dy$ Feb 18 asked Is this example in the Leithold's calculus book wrong?