√30/3×√(1/5)×5/2×√6又2/3
问题描述:
√30/3×√(1/5)×5/2×√6又2/3
答
√30/3×√(1/5)×5/2×√6又2/3
=√30/3×√(1/5)×5/2×√(20/3)
=√(30×1/5×20/3)/3×5/2
=√40×5/6
=5/3√10