|Part 2||Test 4||Time: 1 hour|
Answer: The solution set consists of all x satisfying , or in interval notation, .
Answer: A function is a rule which associates to each element in the domain exactly on element in the range.
Answer: A function is one-to-one if two different values in the domain are mapped to two different values in the range.
Answer: A polynomial function is a function of the form
Answer: A rational function is the quotient of two polynomials.
Answer: The real zeros are x=2, x=1, and .
Answer: The graph of f(x) approaches on the left and on the right.
Answer: The function has at least four distinct real zeros. If counted according to multiplicity, the function has five real roots (x=5 might be a double root).
There many other possible solutions.
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