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
fgiga [73]
3 years ago
6

Find the derivative of f(x) = 2x2 + 7x at -3. That is, find f'(-3).

Mathematics
1 answer:
Mekhanik [1.2K]3 years ago
5 0

Answer:

Hello,

f'(-3) = -5

Step-by-step explanation:

f'(x) = 4 x + 7

f'(-3) = 4 (-3) + 7 = -12 + 7 = -5

or

f(-3) = 2 (-3)² + 7 (-3) = 18 - 21 = -3

f(-3 + h) = 2 (-3 + h)² + 7 (-3 + h)

= 2 (9 - 6h + h²) - 21 + 7h

= 18 - 12h + 2h²  - 21 + 7h

= 2h² - 5h - 3

( f(-3 + h) - f(-3) ) / h = 2h - 5

f'(-3) = lim h→0 ( f(-3 + h) - f(-3) ) / h = lim h→0 (2h - 5) = -5

You might be interested in
Determining the input using an equation f (x) = -1/3x + 7
daser333 [38]

Answer:

19

Step-by-step explanation:

f(x)=2/3

2/3=-1/3x+7

Subtract 7 from both sides

2/3-7=-1/3x

-6 1/3 = -1/3x

Multiply both sides by -3

-3(-6 1/3)=-1/3x(-3)

19 = x

4 0
3 years ago
Translate into an algebraic equation and solve.<br> Twelve more than half a number is 10.
Marizza181 [45]

Answer:

1/2×+12=10, x=-4

Step-by-step explanation:

Just trust me on this

6 0
3 years ago
Read 2 more answers
In a florist shop, the ratio to tulips is 7:2. The shop has 84 tulips on Friday morning. How will the ratio of roses to tulips c
Alexxandr [17]

Answer:

It will stay the same.



3 0
2 years ago
Read 2 more answers
Mary sells to her father, robert, her shares in a corp for $55,000. the shares cost mary $80,000. how much loss may mary claim f
OverLord2011 [107]
Mary Purchase shares  = $80,000
Mary Sells shares = $55,000

Loss she can claim for = $80,000 - $55,000
                                     = $ 25,000 
6 0
3 years ago
Suppose your friend's parents invest $10,000 in an account paying 4% compounded annually. What will the balance be after 9 years
LiRa [457]

Answer:

$14233.12

Step-by-step explanation:

10,000(1+.04/1)^1(9)

5 0
3 years ago
Other questions:
  • What are the possible prices an item when the discount is 15% and the price is $150
    5·1 answer
  • What is 1/6 equivalent to
    13·2 answers
  • Identify the properties used for the first two steps in simplifying 6ab2 + 4a - 3ab2 +3a²b-2a²b2.
    9·1 answer
  • Please help me!! I really need it (:
    14·1 answer
  • Write 3x = 66 as a logarithmic function.
    13·2 answers
  • Which expressions represent the statement “three minus the product of seven and four”? Mark all that apply.
    10·1 answer
  • Anita made these two statements.
    15·1 answer
  • Help me with this please
    14·1 answer
  • If x is an odd number, which of the following is also odd? * X + 1, X + 2, 2x + 2 or 3x + 1​
    13·1 answer
  • 568,319,000,000,000,000,000,000,000 in standard form
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!