I'm not sure about something - should my u be $\displaystyle (x^2+10x+26)^{-1}$ or $\displaystyle 1/(x^2+10x+26)$ ? And do I use the general power rule after the substitution?
I'm not sure about something - should my u be $\displaystyle (x^2+10x+26)^{-1}$ or $\displaystyle 1/(x^2+10x+26)$ ? And do I use the general power rule after the substitution?