1. for the given functions f and g, find the requested function and state t domain f(x)=2x³+1; g(x)=2x²-1 find f.g
2. find the domain and range, then determine whether the relation is a function {(-5,2), (-2,4), (1,7), (-1,4)}
3. given f(x)=5x+7 and g(x)=x²+7 find (g.f)(x)
4. write out the frist five term of the sequence (s_n)={(-1)^n-1(n+3/2n-1)}
5. the general term of the sequence s_n=2, 3/2, 4/3, 5/4,...