Cho \(\int {f\left( x \right){\rm{d}}x = F\left( x \right) + C} \). Khi đó với \(a \ne 0,a,b\) là hằng số, ta có

A. \(\int {f\left( {ax + b} \right){\rm{d}}x}  = aF\left( {ax + b} \right) + C\)

B. \(\int {f\left( {ax + b} \right){\rm{d}}x}  = \frac{1}{{a + b}}F\left( {ax + b} \right) + C\)

C. \(\int {f\left( {ax + b} \right){\rm{d}}x}  = F\left( {ax + b} \right) + C\)

D. \(\int {f\left( {ax + b} \right){\rm{d}}x}  = \frac{1}{a}F\left( {ax + b} \right) + C\)