(10 points) For function y=f(x)=(1)/(x+1), find a polynomial function y=g(x) such that f(x) and g(x) have the same function value, first derivative, second derivative, third derivative, and fourth derivative at x_(0)=0.
7. (10 points) For function y = f(x) = -+1, find a polynomial function y = g(x) such that f( and g() have the same function value,first derivative, second derivative,third derivative and fourth derivative at o=0.