Pergunta

Express the following fraction in simplest form, only using positive exponents. (-3(j^-3a^4)^-3)/(3j^4)a^(8) Answer Attemptiout of 2 square
Solução

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KalineMestre · Tutor por 5 anos
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To simplify the given fraction \frac{-3(j^{-3}a^{4})^{-3}}{3j^{4}a^{8}}, we need to follow these steps:
1. Simplify the expression in the numerator: (j^{-3}a^{4})^{-3}.
Applying the power of a power property, (x^m)^n = x^{m \cdot n}, we get:
(j^{-3}a^{4})^{-3} = j^{-3 \cdot (-3)}a^{4 \cdot (-3)} = j^{9}a^{-12}
2. Substitute back into the original fraction:
\frac{-3(j^{9}a^{-12})}{3j^{4}a^{8}}
3. Simplify the fraction by canceling common factors and applying the properties of exponents:
- The coefficient -3 in the numerator and 3 in the denominator can be simplified:
\frac{-3}{3} = -1
- For the j terms:
\frac{j^{9}}{j^{4}} = j^{9-4} = j^{5}
- For the a terms:
\frac{a^{-12}}{a^{8}} = a^{-12-8} = a^{-20}
4. Combine the results:
-1 \cdot j^{5} \cdot a^{-20} = -j^{5}a^{-20}
5. Express using only positive exponents:
-j^{5} \cdot \frac{1}{a^{20}} = -\frac{j^{5}}{a^{20}}
Thus, the simplest form of the given fraction is -\frac{j^{5}}{a^{20}}.
1. Simplify the expression in the numerator: (j^{-3}a^{4})^{-3}.
Applying the power of a power property, (x^m)^n = x^{m \cdot n}, we get:
(j^{-3}a^{4})^{-3} = j^{-3 \cdot (-3)}a^{4 \cdot (-3)} = j^{9}a^{-12}
2. Substitute back into the original fraction:
\frac{-3(j^{9}a^{-12})}{3j^{4}a^{8}}
3. Simplify the fraction by canceling common factors and applying the properties of exponents:
- The coefficient -3 in the numerator and 3 in the denominator can be simplified:
\frac{-3}{3} = -1
- For the j terms:
\frac{j^{9}}{j^{4}} = j^{9-4} = j^{5}
- For the a terms:
\frac{a^{-12}}{a^{8}} = a^{-12-8} = a^{-20}
4. Combine the results:
-1 \cdot j^{5} \cdot a^{-20} = -j^{5}a^{-20}
5. Express using only positive exponents:
-j^{5} \cdot \frac{1}{a^{20}} = -\frac{j^{5}}{a^{20}}
Thus, the simplest form of the given fraction is -\frac{j^{5}}{a^{20}}.
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