Why is it that e.g. 4ˆ-s = 1/4 s?

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Hi! I hope my question is understandable. This is something I never quite understood.

Why is it that when you put the negative unit in the exponent that it can be translated into a fraction?

(I hope this makes sense! English is not my first language!)

Thanks in advance for the answers!

In: Mathematics

3 Answers

Anonymous 0 Comments

If I’m not mistaken you’ve gotten the rule wrong.
4^-s = 1/4^s not 1/4s

So exponential are the base multiplied by itself so 4^3 = 4 *4 *4

If you then reduce the power by 1 you are basically dividing by the base.

4^2 = 4 *4 which is the same as (4^3 ) /4 which equals 4 *4 *4 /4

So 4^1 = 4 therefore 4^0 = (4)/4 =1

If you keep reducing the power you get 4^-1 = (4^0 )/4 which is 1/4

Then 4^-2 = (4^-1 )/4 which equals (1/4)/4 or 1/4^2

……4^-s = 1/4^s

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