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Mathematics 20 Online
OpenStudy (anonymous):

question 2

OpenStudy (anonymous):

OpenStudy (saifoo.khan):

C

OpenStudy (anonymous):

OpenStudy (saifoo.khan):

A

OpenStudy (anonymous):

OpenStudy (anonymous):

how do you know this so well?

Directrix (directrix):

x^(7/15) --> last choice x ^ (4/5) / x^ (1/3) = x ^ (4/5 - 1/3) = x ^ (7/15)

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