integral akar 4 X min 1 DX

misal u = 4x -1
du/dx = 4
dx = du/4
integral u^1/2 du/4
= 1/4 (u^3/2) / 3/2 + c
= 1/6. (u^3/2) + C
= 1/6.U.U^1/2 + c
= 1/6 (4x-1).akar(4x-1) + c