Find an explicit formula for an.0, 2, 2, 2, 0, 2, 2, 2, . . .
A. an = 1 + (-1)(n(n - 1))/2
B. an = 1 + (-1)(n(n + 1))/2
C. an = 1 + (-1)((n+1)(n+2))/2
D. an = 1 + (-1)(n(n + 1)(n + 2))/6
Answer: D
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(8, -2), (1, 2)
A. - 10
B. - 
C. - 
D. - 
Find fraction notation for the infinite sum. 0.54545454 . . .
A. 
B. 
C. 
D. 1
Solve the problem.An audio speaker that weighs 50 pounds hangs from the ceiling of a restaurant from two cables as shown in the figure. To two decimal places, what is the tension in the two cables? 
A. Tension in right cable: 41.59 lb; tension in left cable: 35.90 lb B. Tension in right cable: 35.90 lb; tension in left cable: 41.59 lb C. Tension in right cable: 14.10 lb; tension in left cable: 41.59 lb D. Tension in right cable: 35.90 lb; tension in left cable: 14.10 lb
Find the distance d(P1, P2) between the points P1 and P2.P1 = (-3, -2); P2 = (7, -6)
A. 84
B. 14
C. 2
D. 84