Find the indicated sum. Use the formula for the sum of the first n terms of a geometric sequence.
A. 
B. 
C. 
D. 
Answer: A
Mathematics
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Find the center and the radius of the circle.x2 + y2 = 81
A. (0, 9), r = 81 B. (0, 0), r = 9 C. (0, 0), r = 81 D. (9, 9), r = 81
Mathematics
Find all the local maxima, local minima, and saddle points of the function.
A. f(0, 0) = -3, test is inconclusive B. f(3, 0) = -3, local minimum; f(0, 3) = -3, local minimum C. f(3, 3) = 159, local maximum D. f(0, 0) = -3, saddle point; f(3, 3) = 159, local maximum
Mathematics
Solve the problem.Find all points of the graph of f(x) = 2x2 + 2x whose tangent lines are perpendicular to the line - 30y = x.
A. (0, 0) B. (8, 144) C. (9, 180) D. (7, 112)
Mathematics
Graph the line described.Through (0, 2); m = 
A. 
B. 
C. 
D. 
Mathematics