7. Suppose V is the positive quadrant in .vv-plane delined as

(a) If two vectors u and v are in V\ is u + v in V?

(bl II u is in V, is Xu in V, where /. is any scalar?

On the basis of (a) and <b), is V a vector space?

8. If A is a 6 x 9 matrix, what is the maximum number of linearly independent columns that A may have?

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