Evaluate by finding the least common denominator. Simplify if possible.
- 
A. 
B. - 
C. - 
D. - 
Answer: A
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Find the eccentricity of the hyperbola.Find the eccentricity of a hyperbola centered at the origin having a focus of 
and corresponding directrix 
A. 
B. 
C. 
D. 
Solve the problem.Decide which of the rational functions might have the given graph. 
A. f(x) = x + 
B. f(x) = 2x + 
C. f(x) = x + 
D. f(x) = x + 2
The following while loop is annotated with a pre- and post-condition and also a loop invariant. Use the loop invariant theorem to prove the correctness of the loop with respect to the preand post-conditions.
Use Euler circles to check the validity of the argument. ? No politicians are honest. Some dishonest people are found out. Therefore, some politicians are found out. ? The argument is __________. ?
A. not valid B. valid