Find the root. Assume that variables represent nonnegative values.

A. 2z
B.
C. z12
D. z3

Answer: D

Mathematics

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Find the phase shift of the function.y = -3 cos (4x + ?)

A. 3? units to the right
B.  units to the left
C. 4? units to the right
D.  units to the left

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Indicate whether the statement is true always, sometimes, or never.When i is raised to an even power, the result is -1.

A. Always B. Never C. Sometimes

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Perform the operation indicated. Simplify. - 

A.
B.
C. - 
D. - 

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Find the fifth term and the nth term of the geometric sequence whose initial term, a, and common ratio, r, are given.a = 1; r = 

A. a5 = ; an = 1 ? n-1
B. a5 = ; an = 1 ? n
C. a5 = ; an = 1 ? n
D. a5 = ; an = 1 ? n-1

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Mathematics