2 years ago

Need help ASAP. 81x⁴=1

Mathematics

1 answer:

fiasKO [112]2 years ago

3 0

X =-1/3, X=1/3 is wrong sorry

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n200080 [17]

For this case we first write the equation of which we will use:
I (db) = 10log (l / l)
We substitute the value of l.
We have then:
l = 10 ^ 8lo
Substituting in the given equation:
I (db) = 10log ((10 ^ 8lo) / lo)
Rewriting:
I (db) = 10 * log (10 ^ 8)
I (db) = 80
Answer:
I (db) = 80
option 4

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