Probability, matrix, and linear algebra

English questions | English homework helpMay 16, 2021

Question 1.
Find x and y so that [2x ???? y; x + 3y] = [1; 25]:
Question 2.
Write the vector [3; 5] as a linear combination of [6; 4] and [3; 1]:
Question 3.
Find the angle between the vectors [1; 2; 2] and [3; 4; 5]:
Question 4.
(a) Find the cross product [2; 3; 4] [7; 6; 5]:
(b) Find a unit vector that is orthogonal to both [2; 3; 4] and [7; 6; 5]:
(c) Compute the dot product of the unit vector that you found in Part (b) with each of [2; 3; 4] and [7; 6; 5]:
Question 5.
Find the shortest vector among the following 3 vectors:
[3; 0; ????5]; [????1; 2; ????4]; [2; 3; 2]:
Question 6.
Find the equation of the line that passes through the points (1; 3; 4) and (5; 8; 6):
Question 7.
Find the equation of the plane that passes through the point (1; 3; 4) and is normal to [4; 3; 2]:

 
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