Ò»Àà $\dif (ax+\frac{b}{x})$ µÄ²»¶¨»ý·Ö

ÀýÌâ1£ºÇ󲻶¨»ý·Ö: \(\displaystyle\int\frac{1}{1+x^4}\,\mathrm{d}x\) ½â£º $$\begin{align*} \int\frac{1}{1+x4}\mathrmx &=\frac{1}{2}\int\frac{x2+1}{1+x4}\mathrmx