Find the first term and the common ratio of the geometric sequence.an = -40(0.4)-n
A. a1 = 16, r = 16
B. a1 = -16, r = -2.5
C. a1 = 100, r = 2.5
D. a1 = -100, r = 0.4
Answer: C
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Find the domain and range and describe the level curves for the function f(x,y).f(x, y) = 
A. Domain: all points in the xy-plane; range: real numbers z ? 0; level curves: parabolas 
B. Domain: all points in the xy-plane excluding x = 0; range: all real numbers; level curves: parabolas 
C. Domain: all points in the xy-plane excluding x = 0; range: real numbers z ? 0; level curves: parabolas 
D. Domain: all points in the xy-plane; range: all real numbers; level curves: parabolas 
Determine whether the form represents a valid argument.rr ? p (p ? r) ? q ~p
A. Valid B. Invalid
Write the equation of the function g(x) that is transformed from the given function f(x), and whose graph is shown.f(x) = x2
A. y = x2 - 4 B. y = (x - 4)2 + 1 C. y = (x + 4)2 D. y = (x - 4)2
Decide whether the relation is a function.
A. Function B. Not a function