求解(1)根号9a²b三次方c四次方(2)(根号b/a)乘根号4ab
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![求解(1)根号9a²b三次方c四次方(2)(根号b/a)乘根号4ab](/uploads/image/z/1625538-66-8.jpg?t=%E6%B1%82%E8%A7%A3%EF%BC%881%EF%BC%89%E6%A0%B9%E5%8F%B79a%26%23178%3Bb%E4%B8%89%E6%AC%A1%E6%96%B9c%E5%9B%9B%E6%AC%A1%E6%96%B9%EF%BC%882%EF%BC%89%EF%BC%88%E6%A0%B9%E5%8F%B7b%2Fa%EF%BC%89%E4%B9%98%E6%A0%B9%E5%8F%B74ab)
求解(1)根号9a²b三次方c四次方(2)(根号b/a)乘根号4ab
求解(1)根号9a²b三次方c四次方(2)(根号b/a)乘根号4ab
求解(1)根号9a²b三次方c四次方(2)(根号b/a)乘根号4ab
(1)根号9a²b三次方c四次方
=√[(3abc²)²b]
=3abc²√b
(2)(根号b/a)乘根号4ab
=√(b/a*4ab)
=√(4b²)
=√(2b)²
=2b
第一题的根号下是哪一部分?