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Anni [7]
3 years ago
10

Drag values to complete each equation.

Mathematics
2 answers:
kherson [118]3 years ago
8 0

Answer:

9^{-7} and 9^{-2}

Step-by-step explanation:

using the rules of exponents

• (a^m)^{n} = a^{mn}

• a^{m} × a^{n} = a^{(m+n)}

• \frac{a^{m} }{a^{n} } = a^{(m-n)}

given (9^{5} × 9^{-9} ) / 9^{3}

= \frac{9^{5+(-9)} }{9^{3} } = \frac{9^{-4} }{9^{3} } = 9^{-4-3} = 9^{-7}

given (9^4)^{3} × 9^{-14}

= 9^{12} × 9^{-14}

= 9^{12+(-14)} = 9^{-2}


MatroZZZ [7]3 years ago
4 0

Answer:  The required values of the given expressions are

\dfrac{9^5.9^{-9}}{9^3}=9^{-7},~~~(9^4)^3.9^{-14}=9^{-2}.

Step-by-step explanation:  We are given to find the values of the following expressions :

E_1=\dfrac{9^5.9^{-9}}{9^3}~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~(i)\\\\\\E_2=(9^4)^3.9^{-14}~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~(ii)

We will be using the following properties of exponents :

(i)~x^a.x^b=x^{a+b},\\\\(ii)~\dfrac{x^a}{x^b}=x^{a-b}\\\\(iii)~(x^a)^b=x^{ab}.

From expression (i), we get

E_1\\\\\\=\dfrac{9^5.9^{-9}}{9^3}\\\\\\=\dfrac{9^{5+(-9)}}{9^3}\\\\\\=\dfrac{9^{-4}}{9^3}\\\\\\=9^{-4-3}\\\\=9^{-7}

and from expression (ii), we get

(9^4)^3.9^{-14}\\\\=9^{4\times3}.9^{-14}\\\\=9^{12}.9^{-14}\\\\=9^{12+(-14)}\\\\=9^{-2}.

Thus, the required values of the given expressions are

\dfrac{9^5.9^{-9}}{9^3}=9^{-7},~~~(9^4)^3.9^{-14}=9^{-2}.

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