→ ttinff :x^3+1=t=>3x^2dx=dt=>...... 03/01 00:03
→ Heaviside :因為算式只有一行 寄站內信給你囉 03/01 00:03
推 jack0711 :∫3X^2√(X^3+1)dX=∫√(X^3+1)d(X^3) 03/01 00:05
→ wangbf :謝謝大家 03/01 00:05
推 qq1234 :答案2? 03/01 00:25
推 sssn1 :4√2 /3 ? 03/01 00:26