V= 4(h^3 +1)^0.5 - 4, find dv/dh when h=2

V= 4(h³+1)^0.5- 4 dV/dh= (4x 0.5) x 3h² x (h³+1)^-0.5  =>  6h²(h³+1)^-0.5 Substitute h=2 into dV/dh   => (6x2²)x(2³+1)^-0.5    => 24 x 1/3 = 8