A recursion formula and the initial term(s) of a sequence are given. Write out the first five terms of the sequence.a1 = 3, an+1 = -an
A. 3, -9, 27, -81, 243
B. 3, 0, -3, -6, -9
C. 3, -3, 3, -3, 3
D. -3, 3, -3, 3, -3
Answer: C
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Determine whether the study involves selection bias, participation bias, both selection bias and participation bias, or neither.A researcher published this survey result: "74% of people would be willing to spend 10 percent more for energy from a non-polluting source". The survey question was announced on a national radio show and 1200 listeners responded by calling in.
A. Selection bias only B. No bias C. Participation bias and selection bias D. Participation bias only
Determine the amplitude, range, and period of the function and sketch its graph.y = sin (x + ?)
A. amplitude: 1; range: [2, 4]; period: 2?
B. amplitude: 1; range: [-1, 1]; period: 2
C. amplitude: 1; range: [-1, 1]; period: 2?
D. amplitude: 1; range: [-1, 1]; period: 2?
Divide.
A. 
B. 36
C. 7
D. 3.6
Write the sum or difference as a product containing only sines and/or cosines.sin(9?) + sin(3?)
A. 2 sin(6?) sin(3?) B. 2 sin(6?) cos(3?) C. 2 sin(12?) D. 2 cos(6?) sin(3?)