Notice that the curve whose length you should find is defined by a rectangular equation, hence, you need to use the next formula such that:
`int_a^b sqrt(1 + ((dy)/(dx))^2)dx`
You need to differentiate the given curve using the chain rule such that:
`((dy)/(dx)) = (2/3)*(3/2)*(x^2 - 1)^(3/2 - 1)*(x^2 - 1)'`
`((dy)/(dx)) = 2x*sqrt(x^2 - 1)`
You need to raise to square...
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