Thread: Simplifying an expression involving indices

I know that:



My brain appears to be shutting down as to the reason why, I think the rule is:



but this one is not in the textbook. If this is right any chance someone could explain why it is right (being a bit dizzy tonight).

Thanks in advance,

Alice

Originally Posted by AliceFisher

I know that:



My brain appears to be shutting down as to the reason why, I think the rule is:



but this one is not in the textbook. If this is right any chance someone could explain why it is right (being a bit dizzy tonight).

Thanks in advance,

Alice

This is not a rule. The actual rule is


- using the rule above (since you have the same exponent) you get


Since this is the correct answer I'm guessing you copied the rule down wrong

Thanks e^(i*pi),

I was sure that was the right answer but I was starting to doubt myself since I could not find the rule in my head or your corrected rule in the textbook. This means my final answer is right which means I can go to sleep now.