题目
若 f'(x) 连续，则下列等式正确的是（ ）。A. int df(x) = f(x)B. dint f(x)dx = f(x)C. int f'(x)dx = f(x)D. dint f(x^2)dx = f(x^2)dx
若 $f'(x)$ 连续，则下列等式正确的是（ ）。
A. $\int df(x) = f(x)$
B. $d\int f(x)dx = f(x)$
C. $\int f'(x)dx = f(x)$
D. $d\int f(x^2)dx = f(x^2)dx$
题目解答
答案
D. $d\int f(x^2)dx = f(x^2)dx$