1.

root3((-a^6 xx b^3 xx c^(21))/(c^9 xx a^(12)))=………

Answer»

`(-bc^(3))/(a^(2))`
`(bc^(4))/(a^(2))`
`(-AB^(4))/(C^(2))`
`(-bc^(4))/(a^(2))`

Solution :use `(a^(m))/(a^(N))=a^(m-n)`and `a^(m)XXA^(n)=a^(m+n)`


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