Use implicit differentiation to find dy/dx and d2y/dx2.2y - x + xy = 2
A. 
= 
; 
= 
B. 
= - 
; 
= 
C. 
= 
; 
= 
D. 
= - 
; 
= 
Answer: A
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Solve.In the study of alternating electric current, capacitive voltage is given by 
, where f is the number of cycles per second, i is the maximum current, and t is the time in seconds. Solve the equation for t.
A. t = 2?f cos 
B. t = 
arccos 
C. t = 2?f arccos 
D. t = 
arccos 
The graph of f(x) = ax2 + bx + c is given in the figure. Determine whether the discriminant is positive, negative, or zero.
A. Zero B. Positive C. Negative
Completely factor the polynomial or state that the polynomial is prime.32x2 + 104x + 60
A. (2x + 1)(4x + 15) B. 4(2x + 1)(4x + 15) C. 4(15x + 5)(x + 3) D. 4(2x + 5)(4x + 3)
Solve the problem.For what numbers x, 0 ? x ? 2?, does sin x = 0?
A. 0, 1
B. 0, 1, 2
C. 0, ?, 2?
D. 
, 