Question

Find the derivative of f(x) = 3x + 8 at x = 4. Help please :(

Answer 1

derivative is 3

Answer 2

thanks but how did you get it?

Answer 3

first differentiate the equation
this would be
f'(x)=3+0
now put value of x and get the result which is 3

Answer 4

im confused, i dont know how you got that :(

Answer 5

basic rule of differentiation!
if u differentiate anything of the form nx where n is a constant you get the constant after differentiating.
and if u differentiate a constant like 8 you get 0

Answer 6

use the power rule which is taking the power moving it down and subtracting it by 1 so \[\frac{d}{dx}x^{n}=nx^{n-1}\]

Answer 7

\(\frac{d}{dx}a^n = na^{n-1}\) in this case n = 1 and 1-1 = 0 and \(x^0=1\)

Answer 8

im still confused guys, im sorry :/

Answer 9

@britanny_ and how is that possible??

Answer 10

Britanny, what are you doing? Go home, you're drunk.

Answer 11

@britanny_ u need the derivative first i think! if you put the value then then you wont get the answer!

Answer 12

lol

Answer 13

ok guys o-o be nice

Answer 14

that kinda just made my day (sadly )

Answer 15

fine whatever you answer it in a way she can understand.

Answer 16

:/ could you help me @britanny_ i have like 4 more of these to do and im confused :(

Answer 17

@britanny_ i think you missed that this is a calculus question - your method is not correct here.

@iluvvyyhu do you know how to find the derivative of y = 3x +8?

Answer 18

no i dont :/ and the class im taking is precalc but its online and they didnt have a good explanation