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Let g(x) be a function defined on [-1,1]. If the area of the equilateral triangle with two of its vertices at `(0,0)` and `(x,g(x))` is `sqrt(3)/4`.then the function g(x) is:

A

`+sqrt1-x^2`

B

`sqrt1-x^2`

C

`-sqrt1-x^2`

D

sqrt1+x^2`

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