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# Quick Past paper question watch

1. what is (256y^256)^1/8

why is it 2y^32 and not 2y^2

The mark scheme states that the answer is 2y^32
2. I'm not exactly good at explaining maths however if you 8th root 256 to get 2, you can't just 8th root its power.

Lets do the fourth root of 4^4

Would you agree that:

4^4 = 256 (just a coincidence)

And the fourth root 4^4 is therefore 4. This is the correct way.

However, you are rooting the power to get this:

4^2 - this is wrong

4^2 is 16 and the fourth root of 16 is 2.

I know this is an awful example but I'm awful at explaining things + I'm also doing GCSE .-.

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Updated: April 21, 2016
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