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Gwar [14]
3 years ago
5

If f(x) = 3x, what is f(4)?

Mathematics
1 answer:
dimulka [17.4K]3 years ago
3 0

Answer:

f(4) = 12

Step-by-step explanation:

Substituting 4 for x in f(x) = 3x, we get f(4) = 3(4) = 12.  We conclude that "the value of the function f(x) = 3x at x = 4 is 12."

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<span>The number of x-intercepts that appear on the graph of  the function
</span>f(x)=(x-6)^2(x+2)^2 is two (2): x=6 (multiplicity 2) and x=-2 (multiplicity 2)


Solution
x-intercepts:
f(x)=0→(x-6)^2 (x+2)^2 =0

Using that: If a . b =0→a=0 or b=0; with a=(x-6)^2 and b=(x+2)^2

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(x+2)^2=0
Solving for x. Square root both sides of the equation:
sqrt[ (x+2)^2] = sqrt(0)→x+2=0
Subtracting 2 both sides of the equation:
x+2-2=0-2→x=-2 Multiplicity 2
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