1. Lets try cal solutions! LATEX???
u =
19 − 2
 x 
,
du =
− 1 
 x 

dx
Solution or Explanation
 dt 


u =
7t − 8,
du =
7 dt,
a =
2 Use
 . 


Solution or Explanation
 2   81 − t^{2} 




dtu = t, du = dt, a = 9
Use
 du   a^{2} − u^{2} 




.
Solution or Explanation
 dt 


u =
5t − 10,
du =
5 dt,
a =
4 Use
 . 

