积分值和积分符号无关.
∫{1,0}f(t)dt=∫{1,0}f(x)dx=∫{1,0}f(y)dy=∫{1,0}f(z)dz=∫{1,0}f(v)dv=∫{1,0}f(u)du
"函数y=f(x)在区间{0,1}上连续"是为了保证f(t)在(0,1)上可积.
积分值和积分符号无关.
∫{1,0}f(t)dt=∫{1,0}f(x)dx=∫{1,0}f(y)dy=∫{1,0}f(z)dz=∫{1,0}f(v)dv=∫{1,0}f(u)du
"函数y=f(x)在区间{0,1}上连续"是为了保证f(t)在(0,1)上可积.