# Precalculus: The Basics Functions and Relations

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### True or False? A function is a binary relation over two sets that associates to every element of the first set exactly one element of the second set.

True
False
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### True or False? A relation is just a set of ordered pairs.

True
False
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### Solve the following equation $$f(x)=x^2-34$$ when $$f(4)$$

$$-18$$
$$-12$$
$$-14$$
$$-11$$
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### Solve the following equation $$f(x)=2x^2+10x+4$$ when $$f(2)$$

$$1$$
$$22$$
$$32$$
$$31$$
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### Solve the following equation $$f(x)=(x+4)(x+2)(x+1)$$ when $$f(5)$$

$$304$$
$$322$$
$$418$$
$$378$$
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