Find the exact value of the expression or state that it does not exist.tan-1
A. - 
B. 
C. 
D. - 
Answer: D
Mathematics
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Solve the problem.Find a unit vector perpendicular to both 7i + 5k and 3k.
A. k B. 21j C. j D. i
Mathematics
Find the value of d2y/dx2 at the point defined by the given value of t.x = 
, y = - t, t = 13
A. -2
B. 
C. 8
D. - 
Mathematics
Identify the vertex, axis, domain, and range of the parabola.f(x) = - 
(x + 2)2 + 1
A. vertex: (-2, 1) axis: x = -2 domain: (-?, ?) range: [1, ?) B. vertex: (-2, -1) axis: x = -2 domain: (-?, ?) range: [1, ?) C. vertex: (-2, 1) axis: x = -2 domain: (-?, ?) range: (-?, 1] D. vertex: (-2, -1) axis: x = -2 domain: (-?, ?) range: (-?, -1]
Mathematics
Simplify.(x6y)3
A. x18y B. x9y4 C. x18y3 D. x9y
Mathematics