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Alenkinab [10]
3 years ago
12

Determine the domain of the function, and choose the correct interval and inequality notations,

Mathematics
1 answer:
pickupchik [31]3 years ago
8 0

Answer:

<u></u>

  • <u>See below</u>

Explanation:

Determining the <em>domain</em> of the function P(x) = 2x + 8 is very trivial and does not require the uses of separate intervals.

The domain of a function is the set of input values (x) for which the function is defined. Thus, the domain of P(x) = 2x + 8 is all the real number, which in interval notaion is:

  • (- ∞, ∞)

The symbol ∞ is used to indicate that there is not limit for the value of x: it can goe from any negative number to any positive number).

For didactic purposes let's determine the domain of the function

P(x) = 2/(x+8).

In this case, the function is not defined when the denominator equals 0.

Then, the domain excludes the values for which x + 8 = 0.

  • x + 8 = 0 ⇒ x = - 8.

Then, the solution is all the real numbers different to - 8.

In <em>interval notation</em> it is:

  • (- ∞, -8) ∪ (-8, ∞)

In form of <em>inequaliy</em> that is:

  • x < - 8 ∪ x > - 8

That means, all the real numbers less than - 8 and all the real numbers greater than 8.

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