daisygtz77 daisygtz77
  • 23-05-2020
  • Mathematics
contestada

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

Respuesta :

hfranc hfranc
  • 23-05-2020

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

Answer Link

Otras preguntas

A zookeeper is monitoring the population of birds. The flock needs to have exactly three times more females than males to thrive, and the zoo only has room for
What Is another word for propagate
Marginal utility is the: A. sensitivity of consumer purchases of a good to changes in the price of that good. B. change in total utility obtained by consuming
The prefab question someone help please !
What did Hernàn cortés hope to find in Mexico? A. They wanted to spread Christianity in Asia. B. They were hoping to invade Asian countries. C. They wanted to
Read the excerpt from It's Our World, Too!: Young People Who Are Making a Difference. At halftime, as homecoming floats circled the field, Allison Gibbons, a me
a–2=3+6a/3 What dose a equal?
Fresh milk has several parts that a farmer can seperate and sell a farmer removes the top layer of fat from fresh milk why is the layer of fat on the top
What is 2.25x+5=13.5x+14
Two decimals that have an estimated sum of 11