化简√5(√2-√1/2) 计算√3÷﹙1/√3+1/√2﹚ 计算﹙√30-√18﹚÷﹙√5-√3﹚-√6
问题描述:
化简√5(√2-√1/2) 计算√3÷﹙1/√3+1/√2﹚ 计算﹙√30-√18﹚÷﹙√5-√3﹚-√6
明天要交非常感谢
答
√5(√2-√1/2)
=√5(√2-1/2√2)
=√5x1/2√2
=1/2√10
√3÷﹙1/√3+1/√2﹚
=√3(1/√3-1/√2)÷[(1/√3+1/√2)(1/√3-1/√2)]
=(1-√3/√2)÷(1/3-1/2)
=(1-1/2√6)÷1/6
=3√6-6
﹙√30-√18﹚÷﹙√5-√3﹚-√6
=√6(√5-√3)÷(√5-√3)-√6
=√6-√6
=0