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Rainbow [258]
3 years ago
8

Pleaseeeeeeeeee help 50 points pleaseeeeeeeeeeeeeeeeeeee

Mathematics
1 answer:
vazorg [7]3 years ago
5 0

Answer:for the one with 16 is 28 and the one with 7 is 4

Step-by-step explanation:

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Screenshot of the question attatched. please help me
Law Incorporation [45]
<h2>Rules of Exponents</h2>

There are many rules that apply to operations involving exponents. In this question, we'll need the following:

<h3>The division rule</h3>
  • ⇒ \dfrac{a^n}{a^m}=a^{n-m}

<h2>Solving the Question</h2>

We're given:

z^{21}\div z^7=z^k (solve for k.)

⇒ Rewrite as a fraction:

\dfrac{z^{21}}{z^7}=z^k

⇒ Use the division rule:

z^{21-7}=z^k\\z^{14}=z^k\\14=k

Therefore, the value of <em>k</em> is 14.

<h2>Answer</h2>

<em>k</em> = 14

5 0
2 years ago
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