So I have two questions where I cannot find apply the antiderivative rule properly.
g(x) = 1/ 9(x^2 + 1)
The rule is 1 / (1+k^2 * x^2) = 1/k * tan^-1 * kx + C
I get 1/9 * tan^-1 * 9x + C
The answer for somereaso does not have a 9 in front of the x for the tan. How come? Isn't the K = 9 ?
Same problem except the question is 1 / 1+ 36x^2 and I get 1/36 * tan^-1 36x + C