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If a ,\ b ,\ c are positive real numbers...

If `a ,\ b ,\ c` are positive real numbers, then `root(5)(3125\ a^(10)b^5c^(10))` is equal to
`(a)\ 5a^2b c^2`
(b) `25 a b^2c`
(c) `5a^3b c^3`
(d) `125\ a^2b c^2`

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