* Determine whether H, a subset of the vector space V, is a subspace of V:
a) V=M^n,n , H={A E M^n,n : det A does not =0}
b) V=P3, H={p E P3 : p(0)=0}
*If p1, p2,.....pm span Pn, write down a mathematical relationship between m and n.
Any help is greatly appreciated!!