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
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