Why anything raise to power zero is equal to 1?
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Explanation
Let's look at a series of base with add 1 positive exponent
5^1 = 5, 5^2 = 25 5^3 = 125, etc.
On the other side, we can also add 1 negative exponents:
5^(-1) = 1/5, 5^(-2) = 1/25, 5^(-3) = 1/125, etc.
So we have two series
5, 25, 125... and 1/5, 1/25, 1/125, ....
(The dots mean that you could continue the series as long as you wanted.)
In the first series you are multiply with 5 and in second series you are dividing with 5
If we add 1 as a sort of mathematical glue between the two series, we get
... 1/125, 1/25, 1/5, 1, 5, 25, 125, ...
Now this above series is much better than the above two series.
In order to make this series, we need 1... which is corresponds to 3^0. So can also write the above series as
... 5^-3, 5^-2, 5^-1, 5^0, 5^1, 5^2, 5^3, ...
Now why is anything raise to power 0 equal to 1?
Consider a^5/a^5 . i.e
5
a
----- = 1
5
a
As you know this is the same as
(a*a*a*a*a)/(a*a*a*a*a) = a^0
So to get the result we subtracted the powers to give 5-5 = 0 But we know that a^5/a^5 = 1, and so a^0 = 1
This does not depend only on a, and is true in the general case. Therefore it is true that "Anything raise to power zero is equal to 1"
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-------------- = ?
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