Calculus/Precalculus/Solutions
< Calculus | Precalculus
Convert to interval notation Edit
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This is equivalent to
State the following intervals using set notation Edit
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Which one of the following is a true statement? Edit
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Let . Then
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Thus,
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Using the same example as above, we have .
false
false
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true
Evaluate the following expressions Edit
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Simplify the following Edit
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Find the roots of the following polynomials Edit
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Factor the following expressions Edit
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Simplify the following Edit
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Functions Edit
52. Let .
a. Compute and .
,
b. What are the domain and range of ?
The domain is ; the range is ,
c. Does have an inverse? If so, find a formula for it.
No, since isn't one-to-one; for example, .
53. Let , .
- a. Give formulae for
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provided . Note that 0 is not in the domain of , since it's not in the domain of , and you can't divide by something that doesn't exist!
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. Although 0 is still not in the domain, we don't need to state it now, since 0 isn't in the domain of the expression either.
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b. Compute and .
; .
c. Do and have inverses? If so, find formulae for them.
Yes; and . Note that and its inverse are the same.
As pictured, by the Vertical Line test, this graph represents a function.
55. Consider the following function
a. What is the domain?
b. What is the range?
c. Where is continuous?
56. Consider the following function
a. What is the domain?
b. What is the range?
c. Where is continuous?
57. Consider the following function
a. What is the domain?
b. What is the range?
c. Where is continuous?
58. Consider the following function
a. What is the domain?
b. What is the range?
c. Where is continuous?
Graphing Edit
59. Find the equation of the line that passes through the point (1,-1) and has slope 3.
60. Find the equation of the line that passes through the origin and the point (2,3).