1.
\(V=\pi\int\limits^1_0x^6dx=\dfrac{\pi x^7}{7}|^1_0=\dfrac{\pi}{7}\)
2.
\(F\left(x\right)=\int sin2xdx=-\dfrac{1}{2}cos2x+C\)
\(f\left(\dfrac{\pi}{4}\right)=1\Leftrightarrow-\dfrac{1}{2}cos\dfrac{\pi}{2}+C=1\Rightarrow C=1\)
\(\Rightarrow F\left(x\right)=-\dfrac{1}{2}cos2x+1\Rightarrow F\left(\dfrac{\pi}{6}\right)=\dfrac{3}{4}\)