1.
Let W = span { v1 rightarrow, v2 rightarrow}, where v1 rightarrow = and v2 rightarrow = .
Determine a value of the parameter p such that w rightarrow = is in W, and then write w
rightarrow as a linear coordination of v1 rightarrow and v2 rightarrow.
Solution
By the Defn of Linear Span= W= XV1+YV2
XV1Â = X(1 2 2)
= (X 2X 2X)
YV2Â = Y(3 0 3 )
= (3Y 0 3Y)
Linear Span of W= (X 2X 2X)+(3Y 0 3Y)
= (X+3Y 2X+0 2X+3Y)
We Have W Defined as (-1 10 P)
(X+3Y 2X+0 2X+3Y) = (-1 10 P)
i.e. X+3Y=-1; 2X=10 ; 2X+3Y=P
X=5; Y=-2;
P=10-6=4
Linear Combination Of W= aV1+bV2
= (a+bY 2a+0 2a+3b)