Use the formula for the sum of the first n terms of a geometric sequence.Find the sum of the first 14 terms of the geometric sequence: -3, -6, -12, -24, -48, . . .
A. -49,147
B. -49,169
C. -49,112
D. -49,149
Answer: D
Mathematics
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Use the total differential dz to approximate the change in z as (x, y) moves from P to Q. Then use a calculator to find the corresponding exact change ?z (to the accuracy of your calculator).4x3y2; P(1, 1), Q(1.01, 0.99)
A. dz = 0.04; ?z = 0.0381920404 B. dz = 0.04; ?z = 0.0391920404 C. dz = 0.03; ?z = 0.0391920404 D. dz = 0.04; ?z = 0.0416920404
Mathematics
Factor.25x2 + 90xy + 81y2
A. (25x + 1)(x + 81) B. (5x + 9y)(5x - 9y) C. (5x - 9y)2 D. (5x + 9y)2
Mathematics
Solve the equation.9x + 7x = 32
A. 2
B. 
C. 
D. 16
Mathematics
Simplify.-1(x + 1)
A. x - 1 B. -x + 1 C. x + 1 D. -x - 1
Mathematics