(4)將u 換為x 解答才算真正完整, \int {{x^3}{{({x^4} + 2)}^{20}}dx} =\frac{1}{{84}}{u^{21}} + C =\frac{1}{{84}}{\left( {{x^4} + 2} \right)^{21}} + C ...
確定! 回上一頁