1. For f(x)= (1-x)/(1+x) and g(x)= x/(1+x) find the simplified form for g[g(x)] and state the domain

2. A particle moves on a line away from its initial position so that after t hours it is s = 2t2 +3t miles from its initial position. Find the average velocity of the particle over the interval [1, 4]. Include units in your answer.