(4) Let f(x) = Vx² + 1 +x. %3D Consider the function g(x) = f(x+3) – f(x) with domain the set of real numbers R. (i) (C Use the definition of the derivative to find f'(T). Find the intervals where the function g is increasing or (ii) decreasing. (iii) (.- , cts) Solve the inequality f (3(xª + 1)) – ƒ (3x*) + /10 3+ V37 -1 < 0.

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