indefinite integral

[kmce]

I am calculating

1/(( 4-t)^3)

However my answer is coming out a negative. 1/(-2(4-t)^2)

I cant remember how to put the equations into proper form in this forum so sorry. But can anyone tell me why the answer is not to be nagative

 

[ksdhart2]

Well, I can confirm what you already know, that your answer is not correct. The actual answer is not negative. As for why your answer is incorrect and where you're going wrong, that I can't say because, unfortunately, it is impossible to troubleshoot work I cannot see. Please show all of your work and steps, even the parts you know for sure are wrong. Thank you.

 

[mmm4444bot]

Did you use u-substitution?

u = 4 - t

If so, then du = ????