im not sure how to do these, i tried integration by parts but just got stuck or got an unsure answer.. (S= integral)
1. S p^5 ln p dp
i got ln p(1/6p^6) - 37/100 p^12 + C, but i think that is wrong
2. S 1 (x^2 + 1) e^-x dx
0
i got 1+ 3e^-1 + C
3. S b =sqrt(3) arctan (1/x) dx
a = 1
4. S b = (1) (r^3)/sqrt (4+r^2)) dr
a = 0