For the polynomial, list each real zero and its multiplicity. Determine whether the graph crosses or touches the x-axis at each x -intercept.f(x) = 
x2(x2 - 3)(x - 1)
A. 0, multiplicity 2, touches x-axis;
1, multiplicity 1, crosses x-axis
B. 0, multiplicity 2, crosses x-axis;
1, multiplicity 1, touches x-axis
C. 0, multiplicity 2, crosses x-axis;
1, multiplicity 1, touches x-axis;
, multiplicity 1, touches x-axis;
-
, multiplicity 1, touches x-axis
D. 0, multiplicity 2, touches x-axis;
1, multiplicity 1, crosses x-axis;
, multiplicity 1, crosses x-axis;
-
, multiplicity 1, crosses x-axis
Answer: D
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A. - 
B. -8
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A. Yes B. No
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A. 
B. 
C. 
D. 
Find the unit vector in the direction of the given vector. Write your answer in the indicated form.Let u = 
. Find the unit vector in the direction of u, and write your answer as a linear combination of the standard unit vectors i and j.
A. 
i + 
j
B. 
i + 
j
C. i + j
D. 
i + 
j