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Liula [17]
4 years ago
5

Given f(x) = 3x - 1 and g(x) = 2x + 1, find (f +g)(3)

Mathematics
1 answer:
Aleks [24]4 years ago
7 0

Answer:

<h2> (f + g)(3) = 15</h2>

Step-by-step explanation:

f(x) = 3x - 1

g(x) = 2x + 1

To find (f +g)(3) , first find (f + g)(x)

To find (f + g)(x) add g(x) to f(x)

That's

(f + g)(x) = 3x - 1 + 2x + 1

= 3x + 2x + 1 - 1

(f + g)(x) = 5x

Now to find (f + g)(3) substitute 3 into

(f + g)(x)

That's

(f +g)(3) = 5(3)

<h3> (f + g)(3) = 15</h3>

Hope this helps you

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Which graph represents the polynomial function g(x)=x3+x2−17x+15?
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Step-by-step explanation:

g(x) = x³ + x² - 17x + 15 is a cubic function because the greatest power

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All graphs represent cubic functions

So to find which graph which represents g(x) we will do these steps

1. Put x = 0 to find the y-intercept

2. If there are more than one graph have the same y-intercept we will

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3. If you still don't know which graph find the x-intercepts

Now let us find the graph which represents g(x)

∵ g(x) = x³ + x² - 17x + 15

∵ x = 0

∴ g(0) = (0)³ + (0)² - 17(0) + 15

∴ g(0) = 15

∵ g(0) is the y-intercept

∴ The graph intersect the y-axis at point (0 , 15)

There is only one graph intersects y-axis at point (0 , 15)

The attached figure is the graph of g(x)

The graph which represents the polynomial function g(x) is:

the 2nd graph in the second line

Learn more:

you can learn more about functions in brainly.com/question/10541435

brainly.com/question/10879401

#LearnwithBrainly

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Step-by-step explanation:

See the step-by-step solution in the picture attached below.

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Answer:

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