-4/3√18÷(2√8×1/3√54)
=-4/3×3√2÷(2×2√2×3√6/3)
=-4√2÷(8√3)
=-√6/6;
很高兴为您解答,skyhunter002为您答疑解惑
如果本题有什么不明白可以追问,