Find the sum of the first n terms of the following arithmetic sequence.a1 = 3, d = 1; n = 5.
A. 25
B. 15
C. 3
D. 8
Answer: A
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Find T, N, and B for the given space curve.r(t) = (cosh t)i + (sinh t)j + k
A. T = - 
(tanh t sech t)i + 
j + 
(sech t)k; N = (-sech t)i - (tanh t)k; 
B. T = 
(tanh t sech t)i + 
j + 
(sech t)k; N = (sech2 t)i - (sinh t)k; 
C. T = 
(tanh t)i + 
j + 
(sech t)k; N = (sech t)i - (tanh t)k; 
D. T = - 
(tanh t)i + 
j + 
(sech t)k; N = (-sech t)i - (sinh t)k ; 
Arrange in order from smallest to largest.8.25, 8
, 8.52, 8
A. 8.25, 8.52, 8
, 8
B. 8
, 8
, 8.25, 8.52
C. 8.25, 8
, 8.52, 8
D. 8
, 8.52, 8
, 8.25
Find the center and radius of the circle.x2 + y2 + 6x - 18y + 90 = 81
A. (-9, 3), r = 81 B. (3, -9), r = 81 C. (-3, 9), r = 9 D. (9, -3), r = 9
Find the real solutions of the equation.2x3 - x2 - 20x + 10 = 0
A. 
B. {-2, 
, - 
}
C. {2, 
, -
}
D. 