Question

find the 57th derivative of y = cos(7x)

Answer 1

you should see a pattern
try to find the first 4 derivatives

Answer 2

^^^

Answer 3

when you get y' , y'', y^(3), y^(4) please let me know

Answer 4

okay sorry lost internet connection
-7sin(7x)
-7^2cos(7x)
7^3sin(7x)
7^4cos(7x)

Answer 5

so would the answer be -7^57sin(7x)?

Answer 6

@freckles ?

Answer 7

looks good to me!

Answer 8

okay thank you :D

Answer 9

well done!