\f6.1 Definition: If every vector in a vector space I can be written as a lin we say that I is spanned or generated by U1, U2, ..., Un and call the set o a spaning set for V, or say that the set of vectors spans V. 6.2 Show that U1 , U2, U3 span R3, where - - - b1 Suppose b = b2 is any vector in R' b3 Let 1 = 2 and v2 - 0 be vectors in R-. What is Span(B, , 52)?8.2 Find a basis for the null space of the matrix A where Ax = 0: 1 2 3 A = 3 6 9 Lo 0 0 basis. The dimension is 2\f