integration, help (1 Viewer)

[excellence1]

integrate
4e^2-x

e^-x/3

 

[photastic]

 

[excellence1]

how come it changed to -3 and did not stayed as 1/3

 

[ml125]

how come it changed to -3 and did not stayed as 1/3

When you integrate -1/3 . e^-x/3 you get e^-x/3, as shown by the rule photastic stated. This is then multiplied by the -3 that was pulled out at the start to get the -1/3 inside the integral so you get a final answer of -3e^x/3