Question

(y^-4)^4 and the answer can't have negative exponents...any help please?

Answer 1

First, get rid of the brackets, by using this rule for powers: \((a^b)^c=a^{bc}\)

Answer 2

What do you get with this rule?

Answer 3

y^-16?

Answer 4

Yes, right! But now you still have that negative exponent.
Better use another (supposedly well-known) rule for powers:

\(a^{-b}=\frac{1}{a^b}\)

Can you do this now?

Answer 5

So now it's? 1/y^16?

Answer 6

Yes, it is! Well done!

Answer 7

BTW, better learn these rulez :)

Answer 8

that's it? really? that's the answer? geez it's way more simpler than my stupid lesson explained it as