Let V be the first quadrant in the xy -plane; that is, let V = { [ x y ] ; x ≥ 0 , y ≥ 0 } a. If u and v are in V , is u + v in V ? Why? b. Find a specific vector u in V and a specific scalar c such that c u is not in V . (This is enough to show that V is not a vector space.)
Let V be the first quadrant in the xy -plane; that is, let V = { [ x y ] ; x ≥ 0 , y ≥ 0 } a. If u and v are in V , is u + v in V ? Why? b. Find a specific vector u in V and a specific scalar c such that c u is not in V . (This is enough to show that V is not a vector space.)
Let V be the first quadrant in the xy-plane; that is, let
V
=
{
[
x
y
]
;
x
≥
0
,
y
≥
0
}
a. If u and v are in V, is u + v in V? Why?
b. Find a specific vectoru in V and a specific scalar c such that cu is not in V. (This is enough to show that V is not a vector space.)
Quantities that have magnitude and direction but not position. Some examples of vectors are velocity, displacement, acceleration, and force. They are sometimes called Euclidean or spatial vectors.
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