Matrix02 wrote:

I did the same thing becuase I thought you use the "power rule here"

Power Rule

The "power rule" tells us that to raise a power to a power, just multiply the exponents. Here you see that 5^2 raised to the 3rd power is equal to 5^6.

x^mn = x^mn

(5^2)^3 = 5^6

Can some please clarify? When do use this rule instead of what was done in the original posting? Thanks so much

I too applied the same logic earlier was shocked to see the answer.

But then realised that there is bracket missing

if 2^(4-1)^2 it actually of the form x^y whereas if it was ((2^(4-1))^3) then we could use the power rule.

Hope this helps

Yogesh