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The primitive of the function f(x)=(1-...

The primitive of the function `f(x)=(1-1/(x^2))a^(x+1/x)\ ,\ a >0` is
(a)`(a^(x+1/x))/((log)_e a)`
(b) `(log)_e adota^(x+1/x)`
(c) `(a^(x+1/x))/x(log)_e a`
(d) `x(a^(x+1/x))/((log)_e a)`

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