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5 votes
Express

2 ^( - 7)
using a positive exponent.​

User Nomie
by
7.9k points

1 Answer

6 votes

Answer:


(1)/(2^7)

Explanation:

To express the number 2⁻⁷ with a positive exponent, we'll make use of the properties of exponents and their relationship with reciprocals.


\hrulefill

Here's a list of the exponent properties:


\boxed{\left\begin{array}{ccc}\text{\underline{Properties of Exponents:}}\\\\1.\ a^0=1\\\\2.\ a^m * a^n=a^(m+n)\\\\3.\ a^m / a^n \ ((a^m)/(a^n) )=a^(m-n)\\\\4.\ (ab)^m=a^mb^m\\\\5.\ (a/b)^m=a^m/b^m\\\\6.\ (a^m)^n=a^(mn)\\\\7.\ a^(-m)=1/a^m\\\\8.\ a^(m/n)=(\sqrt[n]{a} )^m\end{array}\right}

In our case, we will use the reciprocal identity (#7 on the table above).


a^(-m)=(1)/(a^m) \\\\\\\\\therefore 2^(-7)=\boxed{(1)/(2^7) }

Thus, we can represent 2⁻⁷ as a positive exponent .

User Manmohan Badaya
by
8.4k points

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