Find the nth term of the geometric sequence.-2, -6, -18, -54, -162
A. an = -2 ? 3n
B. an = -2 ? 3n
C. an = a1 + 3n
D. an = -2 ? 3n-1
Answer: D
Mathematics
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Find an equation for the tangent to the curve at the given point.f(x) = 10
- x + 1, (100, 1)
A. y = - 
x + 51
B. y = 1
C. y = - 
x + 1
D. y = 
x - 51
Mathematics
Calculate the work done by the force F along the path C.F = xyi + 4j + 8xk; C: r(t) = cos 7ti + sin 7tj + tk, 0 ? t ? 
A. W = 
B. W = 
C. W = 0
D. W = 
Mathematics
Find the midpoint of the segments determined by the given end points.(-4, 0), (9, 4)
A. (-13, -4)
B. 
C. (5, 4)
D. 
Mathematics
Solve the system by the substitution method.
A. {(-3, -6), (-3, 6), (3, 0)} B. {(-3, -6), (3, 0)} C. {(-3, -6), (-3, 6)} D. {(-3, -6)}
Mathematics