Question

Expand the following ​

Answer 1

Answer:

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Answer 2

Step-by-step explanation:

●(1/x+y/3)^3

》(1/x)^3+3(1/x)^2y/3+3 1/2-(y/3^2+(y/3)^3

》(1/x)^3+3•(1^2/x^2)+3•1/x•y^2/3^2+y^3+3^3

》1/x^3+y/x^2+y^2/3x+y^3/27

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