Given the definite integral , which of the following integrals are equivalent and justify your answer. (There could be more then one.)
A.
B.
C.
I need some help on this one...
I'd suggest that you work backward: Take each answer and perform a substitution that will bring the argument of the function f back to x.
For example, look at the first answer:
Let
So
Change the "dummy" variable u to x and we get that
which is not the same as the integral you are looking for.
-Dan