Find a general term an for the geometric sequence.4, - 2, 1, - , , ...

A. an = 4  n-1
B. an =   n-1
C. an = 4  n-1
D. an = 6  n-1

Answer: C

Mathematics

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Evaluate the integral.dx

A.
B.
C.
D. 28

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Multiply.(39)(52)

A. 2028 B. 2128 C. 2038 D. 2018

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Find the center, foci, and vertices of the ellipse. +   = 1

A. center at (0, 0)
foci at (0, - 4) and (0, 4)
vertices at (0, -9), (0, 9)
B. center at (0, 0)
foci at (0, 9) and (7, 0)
vertices at (0, 81), (49, 0)
C. center at (0, 0)
foci at (0, -9) and (0, 9)
vertices at (0, -81), (0, 81)
D. center at (0, 0)
foci at (- 4, 0) and (4, 0)
vertices at (-9, 0), (9, 0)

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Mathematics

Add or subtract as indicated. Simplify if necessary.-  + 

A. - 
B.  
C. -  
D. - 1

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Mathematics