Find the nth term and the indicated term of the arithmetic sequence {an} whose initial term, a, and common difference, d, are given.a1 = 0; d = 
an = ?; a28 = ?
A. an = 
(n + 1); a28 = 
B. an = 
(n - 1); a28 = 
C. an = 4(n - 1); a28 = 27
D. an = 
n; a28 = 7
Answer: B
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Provide an appropriate response.Use the formal definitions of limits to prove 
= ?
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Provide an appropriate response.Find the extrema of f(x, y, z) = x + yz on the line defined by x = 5(4 + t), y = t - 5, and z = t + 4. Classify each extremum as a minimum or maximum. (Hint: w = f(x, y, z) is a differentiable function of t.)
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A. 5x3y2 B. 4x2y3 C. 2x3y2 D. 4x3y2
Give the equations of any horizontal asymptotes for the graphs of the rational functions.f(x) = 
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