1.

Differentiate with respect to x,`(x+1/x)^(3)`

Answer» Let `y=(x+1/x)^(3)`
`therefore (dy)/(dx) = d/(dx)(x+1/x)^(3)= 3(x+1/x)^(3-1)d/(dx)(x+1/x)` [by chain rule]
`=3(x+1/x)^(2)(1-1/x^(2))`
`=3x^(2)-3/x^(2)-3/x^(4)+3`


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