Find the LCD and multiply each term by the LCD. Then solve.
= 
A. x = 2, x = 1
B. x = 4, x = 1
C. x = 2, x = -1
D. x = 4, x = -1
Answer: D
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Find the intersection of the given intervals.(-?, 7) ? [-5, 11)
A. (-?, 11) B. (7, 11) C. (-?, -5] D. [-5, 7)
Prove that the equation is an identity.
= cos2x
What will be an ideal response?
Solve the problem.If the switch is thrown open after the current in an RL circuit has built up to its steady-state value, the decaying current obeys the equation 
How long after the switch is thrown open will it take the current to fall to 
of its original value?
A. -4.60 L/R seconds B. -4.40 L/R seconds C. 1.81 L/R seconds D. 1.61 L/R seconds
Provide an appropriate response.Translate into symbolic form the following statement and explain: If it is not warm and sunny, then we cannot go to the beach.
What will be an ideal response?