Question

两道微积分不定积分计算题,

Answer 1

1、计算前要先会求ln(x+√(a²+x²))的导数[ln(x+√(a²+x²))]'=[1/(x+√(a²+x²))]*(x+√(a²+x²))'=[1/(x+√(a²+x²))]*(1+x/√(a²+x²))=[1/(x+√(a²...