求不定积分:∫[f(x)/f′(x)-f²(x)f″(x)/f′(x)³]dx
问题描述:
求不定积分:∫[f(x)/f′(x)-f²(x)f″(x)/f′(x)³]dx
答
∫[ƒ(x)/ƒ'(x) - ƒ(x)²ƒ''(x)/ƒ'(x)³] dx=∫[f(x)/f′(x)]•(f′(x)²-ƒ(x)²ƒ''(x))/ƒ'(x)²)dx=∫[f(x)/f′(x)]•(f(x)/ƒ'(x))′d...