Find the nth, or general, term for the geometric sequence.-1, 1, -1, 1, ...
A. an = -1n-1
B. an = (-1)n-1
C. an = (-1)n
D. an = -1n
Answer: C
Mathematics
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Evaluate. Simplify if possible. - 
- 
A. - 
B. 
C. - 
D. - 
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Find the center and the radius of the sphere that has the given equation. Select the correct answer.
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Choose the graph of the equation. 
+ 
+ 
= 1
A. 
B. 
C. 
D. 
Mathematics
Perform the indicated operations. Write the resulting polynomial in standard form.(x + y)2
A. x2 + xy + y2 B. x2 + y2 C. x2 + 2xy + y2 D. x2 + 2x2y2 + y2
Mathematics