Find the partial sum.Find the sum of the first six terms of the sequence whose general term is an = (-1)n.
A. 1
B. 0
C. -6
D. -1
Answer: B
Mathematics
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Use the half-angle formulas to evaluate the given function.cos 112.5°
A. 0.9239 B. -0.7071 C. 0.5556 D. -0.3827
Mathematics
Simplify. If an expression does not represent a real number, state this.
A. 3
B. 
C. 9
D. 3
Mathematics
Determine which, if any, of the following functions might be used as a model for the data: Linear, with 
quadratic, with 
quadratic, with with 
neither linear nor quadratic. IA Robotics
Year
A. f(x) = ax2 + bx + c, a > 0 B. f(x) = mx + b C. f(x) = ax2 + bx + c, a < 0 D. neither linear nor quadratic
Mathematics
Simplify, if possible.
A. -1
B. 
C. 
D. 
Mathematics