7.1 Integration By Parts/24

Failed to parse (MathML with SVG or PNG fallback (recommended for modern browsers and accessibility tools): Invalid response ("Math extension cannot connect to Restbase.") from server "https://en.wikipedia.org/api/rest_v1/":): {\displaystyle \int u\,dv= u\cdot v -\int v\, du }

Failed to parse (Conversion error. Server ("https://en.wikipedia.org/api/rest_") reported: "Cannot get mml. Server problem."): {\displaystyle {\begin{aligned}&\int _{0}^{\pi }\underbrace {x^{3}\cos(x)} _{\begin{aligned}u&=x^{3}\quad \quad dv=\cos(x)\\dv&=3x^{2}\quad \quad v=\sin(x)\end{aligned}}\,dx=x^{3}\sin(x)-\int _{0}^{\pi }\underbrace {3x^{2}\sin(x)} _{\begin{aligned}u&=3x^{2}\quad \quad dv=\sin(x)\\du&=6x\quad \quad v=-\cos(x)\end{aligned}}\,dx=x^{3}\sin(x)-{\bigg [}3x^{2}-\cos(x)-\int _{0}^{\pi }-6x\cos(x)\,dx{\bigg ]}\\=&x^{3}\sin(x)-3x^{2}\cos(x)-\int _{0}^{\pi }\underbrace {6x\cos(x)} _{\begin{aligned}u&=6x\quad \quad dv=cos(x)\\du&=6\quad \quad v=sin(x)\end{aligned}}=x^{3}\sin(x)+3x^{2}\cos(x)-{\bigg [}6x\sin(x)-\int _{0}^{\pi }6\sin(x)\,dx{\bigg ]}=x^{3}sin(x)+3x^{2}\cos(x)-6x\sin(x)-6\cos(x){\bigg |}_{0}^{\pi }\end{aligned}}} Failed to parse (MathML with SVG or PNG fallback (recommended for modern browsers and accessibility tools): Invalid response ("Math extension cannot connect to Restbase.") from server "https://en.wikipedia.org/api/rest_v1/":): {\displaystyle \begin{align} &=[(\pi^3\cdot\sin(\pi)+3(\pi)^2\cdot\cos(\pi)-6(\pi)\cdot\sin(\pi)-6\cos(\pi))-(0^3\cdot\sin(0)+3(0)^2\cdot\cos(0)-6(0)\cdot\sin(0)-6\cos(0))] \\ &=[(\pi\cdot 0 +3\pi^2 \cdot -1 -6 \cdot -1)+6 =-3\pi^2+6+6 = -3\pi^2+12 = -17.60 \end{align} }