Law of Exponents: (a*b)^x = (a^x)(b^x)

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(Edited)

In this video I go over the general exponent law with base a: (a·b)x = axbx. In proving it I use the laws of exponents with base e as well as the definition ax = ex·ln a which I covered earlier. Also I use the logarithm law ln(a·b) = ln a + ln b.


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Laws of Exponents – (ab)x = ax bx

Law of Exponents (ab)^x.jpeg

General Laws of Exponents

If x and y are real numbers and a > 0, then:

  1. ax+y = axay
  2. ax-y = ax/ay
  3. (ax)y = axy
  4. (ab)x = axbx

Recall from my previous videos:

  1. ex+y = exey
  2. ex-y = ex/ey
  3. (ex)r = erx

Also Recall Definition: ax = exlna
Also Recall: ln(ab) = ln a + ln b

Proof:

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1 comments
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Yeah, in real numbers everything is so simple. More interesting is noncommutative algebra where such laws do not hold. :)

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