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Let k and m be positive real numbers suc...

Let k and m be positive real numbers such that the function
`f(x)={(3x^2+ksqrt(x+1),, 0 ltxlt1),(mx^2+k^2,,x ge 1):}`
is differentiable for all `x gt0`. Then `(8f'(8))/(f'(1/8))` is equal to _______.

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