Solve the problem.A geometric progression is a sequence of terms in which each term is r times the preceding term. The sum of the first three terms of such a sequence, where a is the first term, is given by the expression 
. Under what circumstances, if any, is this expression undefined?
A. The expression is defined in all circumstances.
B. The expression is undefined for r = 1
C. The expression is undefined for r = 0
D. The expression is undefined for r = -1
Answer: B
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Solve the problem.The charge q (in coulombs) delivered by a current i (in amperes) is given by 
where t is the time (in seconds). A damped-out periodic wave form has current given by 
Find a formula for the charge delivered over time t.
A. 
+ C
B. 
+ C
C. 
+ C
D. 
+ C
For the region R, find the horizontal line y = k that divides R into two subregions of equal area.R is the region bounded by y = 8 - 
and the x-axis.
A. k = 1 - 4
B. k = 8 + 4
C. k = 8 - 
D. k = 8 - 4
Use set notation to identify the shaded region.
A. 
? B
B. 
C. 
? B
D. B - A
Solve the equation by completing the square.x2 = 9 - 4x
A. -2 ± 
B. -1 ± 
C. -2 ± 1
D. 2 + 