Write an expression for the general or nth term, an, for the geometric sequence.-1, - 
, - 
, - 
, . . .
A. an = -1
n-1
B. an = - 
n-1
C. an = an = -1
n-1
D. an = 
n-1
Answer: A
Mathematics
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Find the length of the indicated portion of the trajectory.r(t) = (etcos t)i + (etsin t)j + 7etk, -ln 2 ? t ? 0
A. 
B. 
C. 
D. 
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The graph of a trigonometric function of the form y = A sin (Bx) or y = A cos (Bx) for B > 0 is given. Determine the equation of the function represented by the graph.
A. y = 3 cos 2x
B. y = 2 cos 
x
C. y = 2 cos 3x
D. y = 3 cos 
x
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Graph the inequality.3x + 5y ? 15
A. 
B. 
C. 
D. 
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Determine whether or not the relationship shown in the table is a function.
Does the table define x as a function of y?
A. Yes B. No
Mathematics