Question

Finding the derivative (Problem is in the comments)

Answer 1

(0,-1/2) ? Is it a coordinate point or both values of x.

Answer 2

coordinate point

Answer 3

so could you find f'(x) ?

Answer 4

I dont understand how to

Answer 5

derivative of constant = 0
so,
d/dx (-1/2) = 0
and to get d/dx (x^3)
you need the formula for d/dx(x^n)
do u have it ?

Answer 6

is it 21/5 x^2?

Answer 7

absolutely :)
now just put the co-ordinate in it,
put x=0

Answer 8

is the answer 0 then?

Answer 9

yes!

Answer 10

thank you so much!

Answer 11

welcome ^_^

Answer 12

Can you help me with something else really fast?

Answer 13

I got the answer but I'm not sure if it is right

Answer 14

sure :)

Answer 15

I got -7x^6 sinx^7 but I wasnt sure if you plug the 0 in and the limit then becomes 0?

Answer 16

no, the 'x' does not tend to 0, the 'h' tends to 0
you get that by plugging h=0, the 'x' stays it is and so
-7x^6 sinx^7
is the correct final answer :)

Answer 17

awesome thank you! :)

Answer 18

welcome :)