Bentuk ((x+1))/((x+3)) senilai dengan... a. ((x+2) ! x(x+1)

Bentuk ((x+1))/((x+3)) senilai dengan... a. ((x+2) ! x(x+1) !)/(x !(x+3) !) d. ((x+2) ! x(x-2) !)/((x+3) .(x+2)) b. ((x+2) ! x(x-1) !)/(x ! x(x+2) !) e. ((x+2) ! x(x+1) !)/(x !(x-1) !) c. ((x+3) ! x(x+1) !)/(x ! .(x+2) !)