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a根号1/a＋根号4a－根号a的立方/a－根号b/5除以根号b/20a十分钟内回答,
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a根号1/a＋根号4a－根号a的立方/a－根号b/5除以根号b/20a 十分钟内回答,
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答案和解析
a根号(1/a)＋根号(4a)－(根号a^3)/a－根号(b/5)/(根号b/20a )
=根号a+2根号a-根号a-根号(b*20a/(5*b))
=根号a+2根号a-根号a-根号(4a)
=根号a+2根号a-根号a-2根号(a)
=0
=根号a+2根号a-根号a-根号(b*20a/(5*b))
=根号a+2根号a-根号a-根号(4a)
=根号a+2根号a-根号a-2根号(a)
=0
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