[m]V_{Ox}=π ∫_{0} ^{2}(x^2+1)^2dx=π ∫_{0} ^{2}(x^4+2x^2+1)dx=π\cdot (\frac{x^4}{4}+2\frac{x^3}{3}+x)_{0} ^{2}=π\cdot \frac{2^4}{4}+2\frac{2^3}{3}+2)[/m]= считайте
б)
[m]V_{Ox}=π ∫_{0} ^{2}(\sqrt{x})^2dx=π ∫_{0} ^{2}xdx=π\cdot (\frac{x^2}{2})_{0} ^{2}=π\cdot \frac{2^2}{2}=2π[/m]