List the x-values in the graph at which the function is not differentiable.
A. x = 5
B. x = 2, x = 5
C. Function is differentiable at all points.
D. x = 2
Answer: D
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Find the domain and range and describe the level curves for the function f(x,y).f(x, y) = sin-1(x2 + y2)
A. Domain: all points in the xy-plane; range: all real numbers; level curves: circles with centers at (0, 0)
B. Domain: all points in the xy-plane satisfying x2 + y2 ? 1; range: real numbers - 
? z ? 
; level curves: circles with centers at (0,0) and radii r, 0 < r ? 1
C. Domain: all points in the xy-plane; range: real numbers - 
? z ? 
; level curves: circles with centers at (0, 0)
D. Domain: all points in the xy-plane satisfying x2 + y2 ? 1; range: real numbers - 
? z ? 
; level curves: circles with centers at (0, 0)
Simplify the expression.(
)2
A. -3j B. 3 C. 3j D. -3
Solve the equation.log72 (x2 - x) = 1
A. {-8, -9} B. {1, 72} C. {-8, 9} D. {8, 9}
Find the product.- 
A. 
B. 
C. 
D. - 