Find all cube roots of the complex number. Leave answers in trigonometric form.-6
- 6i
A. 
cis 70°, 
cis 190°, 
cis 310°
B. 
cis 80°, 
cis 200°, 
cis 320°
C. 
cis 70°, 
cis 190°, 
cis 310°
D. 
cis 70°, 
cis 190°, 
cis 310°
Answer: A
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Find all the second order partial derivatives of the given function.f(x, y) = x2 + y - ex+y
A. fxx(x, y) = 2 - ex+y; fyy(x, y) = - ex+y; fyx(x, y) = fxy(x, y) = -ex+y B. fxx(x, y) = 2 + ex+y; fyy(x, y) = ex+y; fyx(x, y) = fxy(x, y) = ex+y C. fxx(x, y) = 2 - y2ex+y; fyy(x, y) = -x2ex+y; fyx(x, y) = fxy(x, y) = - y2ex+y D. fxx(x, y) = 1 - ex+y; fyy(x, y) = - ex+y; fyx(x, y) = fxy(x, y) = -ex+y
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. 
; 
B. 
; 
C. 
; 9
D. 
; 9
Decide whether the ordered pair is a solution of the given system.(4, -2)x + y = -6x - y = -2
A. Yes B. No
Rewrite the expression using the Distributive Property and simplify the result.1 ? (-5 - x2)
A. -4 + x2 B. -5 - x2 C. -4 - x2 D. 5 + x2