Subtracting exponents with same base

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If $2^4 - 2^3 = 2^3$ and $2^5 - 2^4 = 2^4$, then is below a rule of subtracting exponents with similar base and exponents which are just $1$ away from each other?

$$A^e - A^{e-1} = A^{e-1}$$

I will also like to get an visual intuition of why this works. Thanks.

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1 Answer

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For $A \ne 0$ we have:

$A^e - A^{e-1} = A^{e-1} \iff A^e=2A^{e-1} \iff A^e=2 A^e A^{-1} \iff 1=2 A^{-1} \iff A=2$.

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