(分子与父母交换,对吧?用【代替不定积分的符号,用t代替x^2,打字快些)原式=【t/t^2 t 1=1/2【(t^2 t 1)dt^2=1/2(【t^2dt^2 【tdt^2 【1dt^2)=1/2(【xdx 【xdx^2 【1dx^2)=1/2(1/2x^2 2【x^2dx 2【xdx)=5/4x^2 2/3x^3(【t^2dt^2=【xdx)
可以吧?
(分子与父母交换,对吧?用【代替不定积分的符号,用t代替x^2,打字快些)原式=【t/t^2 t 1=1/2【(t^2 t 1)dt^2=1/2(【t^2dt^2 【tdt^2 【1dt^2)=1/2(【xdx 【xdx^2 【1dx^2)=1/2(1/2x^2 2【x^2dx 2【xdx)=5/4x^2 2/3x^3(【t^2dt^2=【xdx)
可以吧?