Answer:

Step-by-step explanation:







(1/4ab)^-2
Remove negative exponent by rewritten the equation as (4ab)^2
AUse Product rule to get:
4^2a^2b^2
Now raise 4 to the second power to get:
16a^2b^2
The last answer is correct.
In this problem the big angle will be equal to two times the smaller angle so the correct expression is:

Now we can rewrite the equation so: