Se f(x)=(3x-1)/(x-7), determine:
(a) (5 f(-1) - 2 f(0) + 3 f(5)) / 7
(b) [f(-1/2)]^2
© f(3 x - 2)
(d) f(t) + f(4 / t)
(e) (f(h)-f(0))/h
(f) f(f(5)).

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