Find the nth term {an} of the geometric sequence. When given, r is the common ratio.8, -16, 32, -64, 128, ...
A. an = 8 ? (-2)n
B. an = a1 - 2n
C. an = 8 ? (-2)n
D. an = 8 ? (-2)n-1
Answer: D
Mathematics
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Use the Gauss-Jordan method to solve the system of equations. If the system has infinitely many solutions, let the last variable be the arbitrary variable. 4x - y + 4z = 58 9x + 3y + 5z = 130 3x - 8y + z = -16
A. ? B. {(8, 6, 8)} C. {(8, 8, 6)} D. {(-8, 6, 16)}
Mathematics
Decompose into partial fractions.
A. 
- 
B. 
+ 
C. 
- 
D. 
- 
Mathematics
Solve the equation.0.50x - 0.40(60 + x) = -0.30(60)
A. {70} B. {50} C. {60} D. {30}
Mathematics
Form a polynomial whose zeros and degree are given. Use a leading coefficient of 1. Zeros: -3, -2, 3; degree 3
A. f(x) = x3 - 2x2 - 9x + 18 B. f(x) = x3 + 2x2 + 9x + 18 C. f(x) = x3 - 2x2 + 9x - 18 D. f(x) = x3 + 2x2 - 9x - 18
Mathematics