integral 2x akar x2 + 4 dx =

jawab

∫ 2x √(x² + 4) dx

u = x² + 4
du = 2x dx
2x dx = du

∫ 2x dx. √(x² +4)  =  ∫u du
= 1/2 u² + c
= 1/2 (x² + 4) + c