Write the expression as a complex number in the form a + bi.7 + 
A. 5
B. 9 + i
C. 7 + 2i
D. 7 - 2i
Answer: C
Mathematics
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Find the first term and the common ratio of the geometric sequence.
, 
, 
, 
, 
, . . .
A. a1 = 4, r = 
B. a1 = 4, r = 6
C. a1 = 
, r = 4
D. a1 = 
, r = 
Mathematics
cos (11?/6)
Determine the following exactly.
Mathematics
Differentiate.f(x) = 
A. f'(x) = 
B. f'(x) = 
C. f'(x) = 
D. f'(x) = 
Mathematics
Use a graphing utility to solve the system of equations. Find the solution(s) accurate to two decimal places.
?
?
A. ?
(-4, 1)
B. ?
(0, 4)
C. ?
(0, -4)
D. ?
(4, 4)
E. ?
(-4, 1)
Mathematics