Watch the Easy Rider online guitar lesson by Brad Carlton from Chord Studies: Slash Chords Vol. 1
This is a I-V/I-vi-V progression in the key of A. We play our A chord with a typical 2-1-3 fingering because it makes the switch to our E/A easier; just pick your third finger up and slide your first finger back. Next we go to F♯m7 and then finish with our typical E chord.