[INST] Given the function f(x)=3x^3+2, find the value of x so that f^-1(x)=4./n [/INST]  ###Response: The equation f^-1(x)=4 is equivalent to x=f(4). Therefore we want to find the value f(4). We compute f(4) = 3 * 4^3 + 2 = 194.