ok not too hard. the answer is 2^1. When your adding indices you add the top and when your subtracting them you subtract the indices. Try check this website out:
Subtracting Indices (with worked solutions & videos)
ok not too hard. the answer is 2^1. When your adding indices you add the top and when your subtracting them you subtract the indices. Try check this website out:
Subtracting Indices (with worked solutions & videos)