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Tema [17]
3 years ago
9

State the domain, the range, and the intervals on which function is increasing decreasing, or constant in interval notation. Sta

te the domain and range using interval notation.
Mathematics
1 answer:
MariettaO [177]3 years ago
6 0

Answer:

Domain = (-\infty, \infty)

Range = (-\infty, 4]

Increasing interval is: (-\infty, 0)

Decreasing interval is: (0, \infty)

Constant at no interval

Step-by-step explanation:

Given

See attachment for graph

Solving (a): The domain

From, the attached graph, we have:

y = -x^2 + 4

The degree of the polynomial (i.e 2) is even.

Hence, the domain is the set of all real numbers, i.e.

Domain = (-\infty, \infty)

Solving (b): The range

The curve of y = -x^2 + 4 opens downward, and the maximum is:

y_{max} = 4

This means that the minimum is:

y_{mi n} = -\infty

Hence, the range of the set is:

Range = (-\infty, 4]

Solving (c): Interval where the function increases/decreases/constant

In (a), we have:

Domain = (-\infty, \infty)

Split to 2 (at vertex x = 0)

(-\infty, 0) and (0, \infty)

So:

The increasing interval is: (-\infty, 0)

The decreasing interval is: (0, \infty)

<em>The function has a tangent at </em>x = 0<em> but at no interval, was the function constant</em>

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