1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
adelina 88 [10]
2 years ago
6

If g is a differentiable function such that g(x)<0 for all real numbers x and if f'(x) = (x2 - 4)g(x), which of the following

is true? i. f has relative maxima at x-2 and at x-2.
ii. f has relative minima at x=-2 and at x=2.
iii. It cannot be determined if fhas any relative extrema.
iv. f has a relative maximum at x=-2 and a relative minimum at x=2.
v. f has a relative minimum at x=-2 and a relative maximum at x=2.
Mathematics
1 answer:
galina1969 [7]2 years ago
6 0

We want to see what can we say about f(x) extremes for the given information. We will see that the correct option is:

V: f has a relative minimum at x=-2 and a relative maximum at x=2.

<h3>Maximums and minimums.</h3>

A given function f(x) will have a maximum/minimum at x₀ if:

f'(x₀) = 0

  • It will be a maximum if f''(x₀) < 0
  • It will be a minimum if f''(x₀) > 0.

Here we do know that:

  • f'(x) = (x^2 - 4)*g(x)
  • g(x) < 0 for all numbers x.

Then the only zeros of f'(x) are when (x^2 - 4) = 0.

And this happens for x = 2 and x  = -2

Now let's see if these are minimums or maximums, we have:

f''(x) = 2*x*g(x) + (x^2 - 4)*g'(x)

If we evaluate this in x = 2, we get:

f''(2) = 2*2*g(2) + (2^2 - 4)*g'(2)

       = 4*g(2) + 0*g'(2) = 4*g(2)

And g(x) is always negative, then 4*g(2) < 0, then:

f''(2) < 0

Meaning that in x = 2 we have a relative maximum.

For x = -2 we have:

f''(-2) = 2*-2*g(-2) + ((-2)^2 - 4)*g'(-2)

       = -4*g(2) > 0

Then f''(-2) > 0, meaning that in x = -2 we have a relative minimum.

Then the correct option is:

V:  f has a relative minimum at x=-2 and a relative maximum at x=2.

If you want to learn more about maximums and minimums, you can read:

brainly.com/question/1938915

You might be interested in
2/3 as a real number
BaLLatris [955]

Answer:

Yes

Step-by-step explanation:

I don't know the question but 2/3 is a real number.

8 0
3 years ago
The number of hours, h, spent studying and the score, s, on a test. What is the dependent variable?
Arada [10]

Answer:

The number of hours.

Step-by-step explanation:

The dependent variable is what you are mesuaring.

7 0
2 years ago
Find the sum of the first 20 terms of the arithmetic sequence 4, 10, 16, 22....
hammer [34]

n = 20

d = 6

a = 4

L = a + (n - 1)*d

L = 4 + (20 - 1)*6

L = 4 + 19*6

L = 118

Sum = (a + L)*n/2

Sum = (4 + 118) * 20/2

Sum = 122 * 10

Sum = 1220

3 0
3 years ago
Find the error sienna used base-ten blocks to find 45÷3 .explain her error
Harrizon [31]
The answer to your question is 15

5 0
3 years ago
0.376×800=(0.376×_____)×100 =______×100 =______
sergey [27]
0.376*800

=(0.376*8)*100

=3.008*100

=300.8
3 0
3 years ago
Other questions:
  • True or false:
    5·2 answers
  • What is the number in standard form?<br><br> 4.9×108
    15·2 answers
  • 6x - 15 = 3 (2x-6) + 3
    5·1 answer
  • Which is greater than 1/7 or 4/6
    5·2 answers
  • Wilton drives a taxicab. He charges $40 per hour. One passenger gave Wilton a tip of $30. He gave Wilton a total of $150. He is
    7·2 answers
  • What are three possible consequences of defaulting on a car loan
    12·2 answers
  • 18, 14, 9, 15, 19, 9<br>Mean_<br>Median showing work ​
    10·1 answer
  • A group of friends are going to see the newest action movie. The price of a ticket is $6.25. As a group, they spent $12 on refre
    13·2 answers
  • NEED THE ANSWER ASAP!!
    11·1 answer
  • ASAP 50 points!!!!!!
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!