Describe the set of points (x, y, z) defined by the equation.x = -2
A. Only the point (0, 0, 0)
B. All points of the form (-2, y, z)
C. All points of the form (x, y, -2)
D. All points of the form (-2, 0, 0)
Answer: B
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Find the limit.
A. 
B. Does not exist
C. 7
D. 
Find the directrices of the hyperbola.49x2 - 576y2 = 28,224
A. x = ± 
B. y = ± 
C. y = ± 
D. x = ± 
The sizes of two matrices are given. Find the size of the product AB and the size of the product BA, if the given product can be calculated.A is 2 × 4; B is 4 × 2.
A. AB is 2 × 2; BA cannot be calculated. B. AB cannot be calculated; BA is 4 × 4. C. AB is 4 × 4; BA is 2 × 2. D. AB is 2 × 2; BA is 4 × 4.
Find the nth term {an} of the geometric sequence. When given, r is the common ratio.-4, -12, -36, -108, -324, ...
A. an = -4 ? 3n B. an = -4 ? 3n C. an = a1 + 3n D. an = -4 ? 3n-1