Im having an issue with:

(u^(3/2))/2

i know that once i evaluate it i am supposed to add +1 to r (which is 3/2 in this case) and that would give me u^(5/2) but I thought i was also supposed to multiply 5/2 times the denominator which would give me 10/2 or 5.......

However I am confused because the answer is supposed to be:

(1/10)(u)^5/2 and when i do it my way i get 5(u)^5/2

What am I doing wrong? Any help would be great, thanks!