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welcome back and thank you so much for joining me today so we are going to be looking at writing in index form yeah I want you to think about the relationship between square roots and and index form so Im gonna pull up here so if Ive got any number and a square root it by something it is always going to equal that number Im one over that end so lets have a look at square root of 15 is really 15 and if not doesnt have an end that just means that n is true so okay so this is square roots we dont have to put a 2 there we just infer so what becomes is 15 to power bahar lets look at 7 arm X to the power 5 which is being square root first thing I think about what is obvious square root well I know the opposite is going to be to the power of 1/2 so Im just going to write it now lets look at our index form our index 4 and index roofs is when weve got a indices for inside and outside they are multiplied together so that just means I have 7 to power of 1/2 X 5 times 1/2 so that will b