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Let f and g be two differentiable functi...

Let f and g be two differentiable functions on R such that `f'(x)>0 and g′(x)<0`, for all `xϵR`. Then for all x : (a) `(f(x+1))>g(f(x-1))` (b) `f(g(x))>f(g(x+1))` (c) `g(f(x+1))

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