解 Jre dr = Trader = re - are dar 继续使用分部积分法,原式= rer - [ re dr = re ... -dt 1 -1 | 1 - [ 1+ De = 2 -40 ) + c = 2x1 + x - ln 1 + + x 1-1 + T 4C .
確定! 回上一頁