Question

So we know that the pattern goes that i^3=-i and i^7 is also -i. So if you set them equal to each other, i^3=i^7 and then take the log to both sides you get:

3ln(i)=7ln(i)

And then you can simplify this down by dividing out the ln(i) to get 3=7. Obviously this isn't true, so what am I doing wrong?