Describe the domain of the function of three or more varables.f(w, x, y, z) = 
A. All points in ?4 that satisfies w2 + x2 + y2 + z2 ? 0.
B. All points in ?4.
C. All points in ?4 except the origin (0, 0, 0, 0).
D. All points in ?4 that satisfy w > 0, x > 0, y > 0, z > 0.
Answer: B
Mathematics
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Find a formula for the nth partial sum of the series and use it to find the series' sum if the series converges.8 - 
+ 
- 
+ ... + (-1)n-1 
+ ...
A. 
; 10
B. 
; 
C. 
; 
D. 
; 10
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A. 5x2 - 5x - 30 B. 5(x + 2)(x - 3) C. (5x + 10)(x - 3) D. 5(x - 2)(x + 3)
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Solve the equation.log1/4x = -3
A. 
B. 
C. 
D. 
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