解：4△1/2＝﹙4－2×1/2﹚/4×1/2＝3/2 ∴ 3△﹙4△1/2﹚＝3△3/2＝﹙3－2×3/2﹚/3×3/2＝0.
3△(4△1/2)=3△[ ( 4 - 2× 1/2 ) ÷ ( 4× 1/2 ) ]=3△(3/2)=(3 - 2× 3/2) ÷ (3×3/2) =0÷ (9/2)=0
