Find ∫3x dx\int \frac{3}{x}\,dx∫x3dx for x>0x > 0x>0.
3lnx+C3\ln x + C3lnx+C
3ln∣x∣+C3\ln|x| + C3ln∣x∣+C
−3x2+C-\frac{3}{x^2} + C−x23+C
3x+C\frac{3}{x} + Cx3+C