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Elena L [17]
3 years ago
6

For what value of a does (1/9)^a+1 =81^a+1 x 27^2-a ?-4-226

Mathematics
2 answers:
EastWind [94]3 years ago
4 0

Answer:

- 4

Step-by-step explanation:

Using the rule of exponents

• a^{m} × a^{n} ⇔ a^{(m+n)}

• a^{-m} ⇔ \frac{1}{a^{m} }

(\frac{1}{9}) ^{a+1} = 9^{-(a+1)} = 3^{-2(a+1)}

and right side

= 3^{4(a+1)} × 3^{3(2-a)}

Hence

3^{-2a-2} = 3^{4a+4} × 3^{6-3a}

3^{-2a-2} = 3^{a+10}

Equating exponents on both sides gives

a + 10 = - 2a - 2 ( add 2a to both sides )

3a + 10 = - 2 (subtract 10 from both sides )

3a = - 12 ( divide both sides by 3 )

a = - 4

solong [7]3 years ago
3 0

Answer:

the answer to the question you is A on edg

Step-by-step explanation:

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