Question

the most general anti derivative of 5/x^4

Answer 1

Go back to the first time you posted this...use power rule on 5 * x^-4, and you get -4 * 5 * x^-5, which is -20 * x^-5, or -20/x^5.

Answer 2

Sorry, I read it wrong xD The derivative is what I answered with, the antiderivative is found by adding 1 to the power, and multiplying by that new power. In this case, you'd get 5 * -3 * x^-3