Question

whats the derivative of arctan7z

Answer 1

\[d \tan^{-1} u=[1/(1+u ^{2})]du/dx\]

Answer 2

The derivative of f(x) = arctan x is given by

f '(x) = 1 / (1 + x 2)

Answer 3

It's a formula that you have to memo!
put for each x=7z in
f '(x) = 1 / (1 + x^2)

Answer 4

ty

Answer 5

clear ?

Answer 6

yah as crystal

Answer 7

nice =)

Answer 8

Good job, nice, but using x is an elementary way of stating the problem. It doesn't account for the chain rule. Better use u, then tag on du. (Your answer as given, must be multiplied by 7.)